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Sagot :

bonjour

factoriser ; on part de ka + kb pour arriver à k(a+b)

iciA=2t²-3t = t * 2t - t * 3 = t (2t - 3)

ex 53 : A=-5x² + 25x = 5x * (-x) + 5x * 5 = 5x (-x + 5)

B = 4x² + 20x = 4x * x + 4x * 5 = 4x (x+5)

B=-10-16a​ = -2 * 5 - 2 * 8a = -2 (5+8a)

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