4. (4 points) Let X = IC21 I22 be a real matrix such that Which of the following statements is correct? (A)조12=2(B)zz (C)2)2u=-1(D) =zT32] T31

9. (4 points) Let u = [-1,2] and u = [3,-5] in R2 and let T : R2 -＞ R? R? be a linear transformation such that T'(u) = [-2,1,0] and T(b)= (5,-7,1]. Let [a11 a12] A= a21 022 Q31 be the standard matrix representation of T. Which of the following is TRUE? (A)aL=0(B)az=1(C)az=-2(D)azz=1