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Problem 2 (10 pts) For a fixed matrices B, C e R2x2, let W = {A € R2x2 | A * B = 2A *C}. Determine if W is a subspace of R2x2

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Answer #1

we first prove that for atR. and A E W - DAEW Now, X AA B. a(A+B) and 2(QA) * < (2A*) Since A*B=20*C. SD, (XA)* B - 2 (&A) ** Now, (QA, + BA2) * B (XA,)*.B + (BAQ)* B 2 (QAT) * C + 2 (849) *C [By D 2 [[& A + BA2) * C 2 (d. A1 + BA g) * So, Laitß A2

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