Question

Dadas as matrizes A= [4 -2 ] [-2 7] e B= [0 2] [2 -3] resolva os sistema - Y + 2Y =A X - Y =B

Answer 1

- y + 2x = A
- y + x = B *(-1)

-y + 2x = A
y - x = -B
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2x - x = A-B
x = A-B

y - x = -B
y - (A-B) = -B
y = -B+A-B
y = A-2B

x = ....(4, 0)(0,4)
y = (4, -2)(-2,7) - 2*(0,2)(2,-3)
y = (4, -2)(-2,7) + (0,-4)(-4,6)
y = (4, -6)(-6, 13)