Bonjour pouvez vous m'aider ces exercices je suis en 3°E merci
A. (x-1)(2x+5) B. (-3-2x)(-6-3x)
C. (4-2x)(5x-9) D. (-x+1)(x-1)
A. (x-1)(2x+5) B. (-3-2x)(-6-3x)
C. (4-2x)(5x-9) D. (-x+1)(x-1)
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Bonsoir
Explications étape par étape
A= (x-1)(2x+5)
A = 2x^2+5x-2x-5
A = 2x^2+3x-5
B = (-3-2x)(-6-3x)
B = 18+9x+12x+6x^2
B= 6x^2+21x+18
C = (4-2x)(5x-9)
C = 20x-36-10x^2+18x
C = -10x^2+38x-36
D = (-x+1)(x-1)
D = -x^2 +x+x-1
D = -x^2+2x-1