find matrix

Find the matrix for T relative to the basis B, and use Theorem 8.5.2 to compute the matrix for T relative to the basis B'. T : R2 - R2 is defined by * +7x2 T (1) = 3X - 4X, and B = fu,, uz} and B' = {v1, V2), where 18 10 u1 V1 8 V2 = 5