"T1(v) = 7v - 7u

T1(u) = -6v + 5u

T2(v) = -3v + 5u

T2(u) = -5v - 6u

Find (T2T1)(v) and (T2T1)(u)"

I know to find the matrix T2T1 I just have to multiply them together, but I'm not sure how to find the transformation matrices for T1 or T2. Can anyone nudge me in the right direction on how to solve this?