34 Factoriser à l'aide de l'identité remarquable
a²-b² = (a + b)(a - b) :
a. (3x + 6)²-(4x + 2)²
c. (x + 1)²-(x + 3)²
b. (5-x)²-(6x-8)²
d. (7+ x)² (7- x)²
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