Bonjour
G=(x+7)(x+3) = x^2 +3x +7x +21
= x^2 + 10x + 21
h=(x-5)(x+2) = x^2 + 2x -5x -10
= x^2 -3x -10
I=(2x+1)(x-4) =2x^2 -8x +x -4
= 2x^2 -7x -4
J=(x-3)(3x-2) = 3x^2 -2x -9x + 6
= 3x^2 -11x + 6
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Bonjour
G=(x+7)(x+3) = x^2 +3x +7x +21
= x^2 + 10x + 21
h=(x-5)(x+2) = x^2 + 2x -5x -10
= x^2 -3x -10
I=(2x+1)(x-4) =2x^2 -8x +x -4
= 2x^2 -7x -4
J=(x-3)(3x-2) = 3x^2 -2x -9x + 6
= 3x^2 -11x + 6