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Sagot :

AYUDA

bjr

A = (2+2x) / 4 = 2 (1+x) / 2*2 = (1+x) / 2

B = x² - 6x + 9 - (x-3)

 = (x-3)² - (x-3)

 = (x-3) (x-3) - 1 (x-3)

 = (x-3) (x-3 - 1)

 = (x-3) (x-4)

C = 4x² - 9(x+1)² = (2x)² - (3(x+1))² = (2x + 3(x+1)) (2x - 3(x+1)

= (5x + 3) (-x -3)

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