Réponse:
bonjour
J = (3x + 2)²
= ((3x)² + 2×3x×2 + 2²)
= 9x² + 12x + 4
L = (-4x + 12)²
= ((-4x)² + 2×(-4x)×12 + 12²)
= 16x² -96x + 144
N = (2/3 - 2 )²
= (-4/3)²
= 16/9
K = (9x-1)²
= ((9x)² - 2×9x×1 + 1²)
= 81x² - 18x + 1
M = (-5x-7)²
= ((-5x)² - 2×(-5x)×7 + 7²)
= 25x² + 70x + 49
P = (3/7x + 7/6)²
= ((3/7x)² + 2×3/7x×7/6 + 7/6²)
= 9/49x² + x + 49/36
