Question 32860: Both Values in a Matrix Scalar Identity

Original question and givens

Over R, the 2×2 matrix is M=[[-3, 2], [-2, 10]]. In the fixed standard basis, T:R²→R² is T(x)=Mx, with column vectors. For u=[-3, 10] and c=-5, compute T(cu) and cT(u). Answer as left vector = right vector.

• G001 — Over R, the 2×2 matrix is M=[[-3, 2], [-2, 10]]. In the fixed standard basis, T:R²→R² is T(x)=Mx, with column vectors. For u=[-3, 10] and c=-5, compute T(cu) and cT(u). Answer as left vector = right vector.

Definition and scope

Use the original question domain, assumptions and cited MKO definitions. This item has second-context mathematical and bilingual review, with the model, answer and every arithmetic step independently recomputed from the original parameters; the source question remains a candidate.

• mko-linear-transformation

Step-by-step derivation

source roles = [qf-linear-map-homogeneity-values, homogeneity_values, reals, []]

derived = [[VECTOR_EQUALS_VECTOR_STRING]]

Homogeneity ORIGINAL c times u ORIGINAL component0 := mul(-5, -3)

Homogeneity ORIGINAL c times u ORIGINAL component0 = 15

Homogeneity ORIGINAL c times u ORIGINAL component1 := mul(-5, 10)

Homogeneity ORIGINAL c times u ORIGINAL component1 = -50

Homogeneity LEFT M of scaled input ORIGINAL row0 column0 product := mul(-3, 15)

Homogeneity LEFT M of scaled input ORIGINAL row0 column0 product = -45

Homogeneity LEFT M of scaled input ORIGINAL row0 column1 product := mul(2, -50)

Homogeneity LEFT M of scaled input ORIGINAL row0 column1 product = -100

Homogeneity LEFT M of scaled input ORIGINAL row0 two products sum := sum(-45, -100)

Homogeneity LEFT M of scaled input ORIGINAL row0 two products sum = -145

source roles = [Homogeneity LEFT M of scaled input, 0, [-3, 2], [15, -50]]

derived = [[-45, -100], -145]

Homogeneity LEFT M of scaled input ORIGINAL row1 column0 product := mul(-2, 15)

Homogeneity LEFT M of scaled input ORIGINAL row1 column0 product = -30

Homogeneity LEFT M of scaled input ORIGINAL row1 column1 product := mul(10, -50)

Homogeneity LEFT M of scaled input ORIGINAL row1 column1 product = -500

Homogeneity LEFT M of scaled input ORIGINAL row1 two products sum := sum(-30, -500)

Homogeneity LEFT M of scaled input ORIGINAL row1 two products sum = -530

source roles = [Homogeneity LEFT M of scaled input, 1, [-2, 10], [15, -50]]

derived = [[-30, -500], -530]

Homogeneity RIGHT M of u ORIGINAL row0 column0 product := mul(-3, -3)

Homogeneity RIGHT M of u ORIGINAL row0 column0 product = 9

Homogeneity RIGHT M of u ORIGINAL row0 column1 product := mul(2, 10)

Homogeneity RIGHT M of u ORIGINAL row0 column1 product = 20

Homogeneity RIGHT M of u ORIGINAL row0 two products sum := sum(9, 20)

Homogeneity RIGHT M of u ORIGINAL row0 two products sum = 29

source roles = [Homogeneity RIGHT M of u, 0, [-3, 2], [-3, 10]]

derived = [[9, 20], 29]

Homogeneity RIGHT M of u ORIGINAL row1 column0 product := mul(-2, -3)

Homogeneity RIGHT M of u ORIGINAL row1 column0 product = 6

Homogeneity RIGHT M of u ORIGINAL row1 column1 product := mul(10, 10)

Homogeneity RIGHT M of u ORIGINAL row1 column1 product = 100

Homogeneity RIGHT M of u ORIGINAL row1 two products sum := sum(6, 100)

Homogeneity RIGHT M of u ORIGINAL row1 two products sum = 106

source roles = [Homogeneity RIGHT M of u, 1, [-2, 10], [-3, 10]]

derived = [[6, 100], 106]

Homogeneity RIGHT c times image ORIGINAL component0 := mul(-5, 29)

Homogeneity RIGHT c times image ORIGINAL component0 = -145

Homogeneity RIGHT c times image ORIGINAL component1 := mul(-5, 106)

Homogeneity RIGHT c times image ORIGINAL component1 = -530

source roles = [homogeneity_values, [[-3, 2], [-2, 10]], [-3, 10], -5]

derived = [[-145, -530], [-145, -530], [-145, -530] = [-145, -530]]

Reverse checks

• S022 · premise_and_result_audit — Reverse-check ORIGINAL data,field roles,types,domain and premises;the conclusion need not uniquely recover its premises.Keep source-bound candidates,independent review,formal proof and publication separate.
• S021 · premise_and_result_audit — Recompute Homogeneity RIGHT c times image ORIGINAL component1 with exact rational arithmetic, not rounded decimals.
• S020 · premise_and_result_audit — Recompute Homogeneity RIGHT c times image ORIGINAL component0 with exact rational arithmetic, not rounded decimals.
• S019 · premise_and_result_audit — Reverse-check ORIGINAL data,field roles,types,domain and premises;the conclusion need not uniquely recover its premises.Keep source-bound candidates,independent review,formal proof and publication separate.
• S018 · premise_and_result_audit — Recompute Homogeneity RIGHT M of u ORIGINAL row1 two products sum with exact rational arithmetic, not rounded decimals.
• S017 · premise_and_result_audit — Recompute Homogeneity RIGHT M of u ORIGINAL row1 column1 product with exact rational arithmetic, not rounded decimals.
• S016 · premise_and_result_audit — Recompute Homogeneity RIGHT M of u ORIGINAL row1 column0 product with exact rational arithmetic, not rounded decimals.
• S015 · premise_and_result_audit — Reverse-check ORIGINAL data,field roles,types,domain and premises;the conclusion need not uniquely recover its premises.Keep source-bound candidates,independent review,formal proof and publication separate.
• S014 · premise_and_result_audit — Recompute Homogeneity RIGHT M of u ORIGINAL row0 two products sum with exact rational arithmetic, not rounded decimals.
• S013 · premise_and_result_audit — Recompute Homogeneity RIGHT M of u ORIGINAL row0 column1 product with exact rational arithmetic, not rounded decimals.
• S012 · premise_and_result_audit — Recompute Homogeneity RIGHT M of u ORIGINAL row0 column0 product with exact rational arithmetic, not rounded decimals.
• S011 · premise_and_result_audit — Reverse-check ORIGINAL data,field roles,types,domain and premises;the conclusion need not uniquely recover its premises.Keep source-bound candidates,independent review,formal proof and publication separate.
• S010 · premise_and_result_audit — Recompute Homogeneity LEFT M of scaled input ORIGINAL row1 two products sum with exact rational arithmetic, not rounded decimals.
• S009 · premise_and_result_audit — Recompute Homogeneity LEFT M of scaled input ORIGINAL row1 column1 product with exact rational arithmetic, not rounded decimals.
• S008 · premise_and_result_audit — Recompute Homogeneity LEFT M of scaled input ORIGINAL row1 column0 product with exact rational arithmetic, not rounded decimals.
• S007 · premise_and_result_audit — Reverse-check ORIGINAL data,field roles,types,domain and premises;the conclusion need not uniquely recover its premises.Keep source-bound candidates,independent review,formal proof and publication separate.
• S006 · premise_and_result_audit — Recompute Homogeneity LEFT M of scaled input ORIGINAL row0 two products sum with exact rational arithmetic, not rounded decimals.
• S005 · premise_and_result_audit — Recompute Homogeneity LEFT M of scaled input ORIGINAL row0 column1 product with exact rational arithmetic, not rounded decimals.
• S004 · premise_and_result_audit — Recompute Homogeneity LEFT M of scaled input ORIGINAL row0 column0 product with exact rational arithmetic, not rounded decimals.
• S003 · premise_and_result_audit — Recompute Homogeneity ORIGINAL c times u ORIGINAL component1 with exact rational arithmetic, not rounded decimals.
• S002 · premise_and_result_audit — Recompute Homogeneity ORIGINAL c times u ORIGINAL component0 with exact rational arithmetic, not rounded decimals.
• S001 · premise_and_result_audit — Reverse-check ORIGINAL data,field roles,types,domain and premises;the conclusion need not uniquely recover its premises.Keep source-bound candidates,independent review,formal proof and publication separate.

Result

[-145, -530] = [-145, -530]

The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.

This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.