coucou
EX32
(a+b)(c+d) = ac + ad + bc + bd
a = (x+4)(x+3)
a = x² + 3x + 4x + 12
a = x² + 7x +12
b = (y+3)(2y+8)
b = 2y² + 8y + 6y + 24
b = 2y² + 14y + 24
fais pareil pour les deux suivants et pour 33,34,35
aide EX34
a(b+c)(d+e) = (ab+ac)(d+e) = abd + abe + acd + ace
E = 5(3g+1)(g-2)
E = (15g+5)(g-2)
E = 15g² -30g + 5g -10
E = 15g² -25g -10
EX36
a) A = (x+2)(x-3) + (x-3)
A = x² -3x + 2x -6 + x -3
A = x² -9
B = (2x-3)²
B = 4x²-12x +9
b) x=3 A= 3²-9 = 9-9 = 0
x=0 A= 0² -9 = -9
c) la forme developper x²-9
d) x=1,5 B =(2*1,5-3)² = 0² = 0
x=0 B = (2*0-3)² = (-3)² = 9
voila j espere t avoir aider
