Développer

A=5+(2a-7)
B = 5(2x-7)
C = 5-(2b-7)
D=5 (y + 3)-3(y + 4)
E=(5-t) (t-6)
F = -8 (3 + c) (c-2)
G = -8 (3+a) + (a-2)
H = (2z + 1) (z + 3) + (3z-1) (2z - 5)
i= (2a-1)(a +5)-(2a-1) (5a + 4)
J = 5b (2b-1) +2 (3b+7) (b-2)
K = (6a-1)(a + 3)-2 (6a-1) (3a + 7)
L = (x + 3)² + (x + 2)²
M = (2a + 5)² + (2a - 5)²
N=(2z+5 y) (2z - 5y)
0=(3e-7)²-(3e+7)²
P = (r+ 5)² - ( 2r-10) (r-4)
Q=t²-4-(t+2) ( 3t-5)
R = (u + 3) (2u + 1) + 4 (u²-9)

Factoriser.
S = 9a² + 3a
T = 27-4z U = 5(b + 2) + 3b (b + 2)
V = (a + 7) (2a+3)+(a+7)
W = (a-1)(a +3)+(a-5) (a-1)
X=(3t-4) (t+5)-(2t+1) (3t-4)
A= (p+1)² + (p+1) (p+3)
B=(q-8)²-25 C=(21-3)²-(5t + 2)²
D = 64z² - 169
E =9-42b +49b²
F = 25+ 20u + 4u²

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