factorisation ??? A=36-25x(lettre)au carré B=100+60x(lettre)+9x(lettre) au carré C=(2-x(letrre) )+ (2-x (lettre) ) D=b au carré - 10b + 25 E=(2-x(lettre)) au carré + b(2- x5(lettre)(9+x lettre) AIDEZ MOI SVP URGENT !!
A= 36- 25x²
A= 6² - (5x)²
A= (6-5x)(6+5x)
C = 2i (i+1) + 2i(2+i)
C = 2i [(i+1)(2+i)]
C= 2i (2i+i²+2+i)
C=2i (3i+i²+2)
E = (2-x)² + (2-x)(9-x)
E = (2-x) [(2-x)+(9+x)]
E = (2-x) (18+2x+(-9x)-x²)
E = (2-x) (18-7x-x²)
F = (5x+1)² - 81
F = (5x+1)² - 9²
F = [5x+1+9)(5x+1-9)
F = (5x+10)(5x-8)
G = (7d+2)² - (3d+4)²
G = (7d+2+3d+4)(7d+2-3d+4)
G = (10d+6)(4d+6)