Soal matriks mohon dibantuu

A = (1 -1)
(2 -2)
B = (1 1)
(4 -2)
A + B = (1 -1) + (1 1)
(2 -2) (4 -2)
= (2 0)
(6 -4)
(A + B)^2 = (A + B)(A+B)
= (2 0) (2 0)
(6 -4) (6 -4)
= (4 + 0 0 + 0)
(12 - 24 0 + 16)
= (4 0)
(-12 16)
Kalau ada yg ndak jelas tanya ya dek, ndak pa2 koq