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bonsoir pouvez vous maidez svp :
factoriser chaque expression
1
a)A=a²+3a
b)B=4b²-12

2
a)A=2t²-3t
b)B=4x²+20x

3
a)A=-5x²+25x
b)B=-10-10a
Merci


Répondre :

Bonsoir,


1a. A = a^2 +3a = a(a+3)

b. B = 4b^2 -12 = 4(b^2 -3)

2a. A = 2t^2 -3t = t (2t -3)

2b. B = 4x (x +5)


3a. A = -5x^2 +25x = 5x (-x +5)

3b. B = -10 (1 + a)