mattttttttttt matrix

a). x (x + 6 ) - ( 4 ( x + 2)) = 0
x² + 6x - 4x - 8 = 0
x² + 2x - 8 = 0
( x - 2 ) ( x + 4)
x = 2
x = -4

b). -x . 10 - ( 2 ( 2x + 4)) = 0
-10x - 4x -8 = 0
-14x - 8 = 0
x = - 8/14

c). x².x - 4x . 1 = 0
x³ - 4x = 0
x ( x² - 4) = 0
x ( ( x - 2 ) ( x + 2 ) ) = 0
x = 2
x = -2

d). ( x - 2) ( x + 2)² - 4x + 8 = 0
x³ + 2x² - 4x - 8 - 4x + 8 = 0
x³ + 2x² - 8x = 0
x ( x² + 2x - 8 ) = 0
x ( ( x - 2) ( x + 4) ) = 0
x = 2
x = -4

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