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Exercice 5 : Factoriser, si possible, les expressions suivantes en utilisant une identité remarquable.
A = a² + 6a +9;
E = 25x² + 10x + 1;
1 = 25a²-30a +9;
M=9-48x + 64x²;
Q = 4x² - 25y²;
B = y²-8y + 16;
F = 36y²-24y + 4;
J = 36y² + 30y + 25;
N = 36x²-49;
R=x²-8xy + 16y²;
C = 49 + 14b + b²;
G=9a² + 12a + 4;
K = 4-28x + 49x²;
O= 4x²5x + 9;
S = 9x² + 4;
Exercice 6:
D=x²-81;
H = 36-b²:
L = 4-81² ;
P = 49x² + 4 + 28x;
T = 25x² + 30xy +9y².

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