Réponse :
Explications étape par étape :
A = (4x-1)(6 - 3x)
=24x -12x² -6 +3x
= -12x² +27x -6
B = (x-2)(x + 7) + x²
= x² +7x -2x -14 +x²
= 2x² +5x -14
C = 2x² + (x-4)(3-X)
= 2x² +3x -x² -12 +4x
= x² +7x -12
D = x(x-1)-3(x + 1)
= x² -x -3x -3
= x² -4x -3
E = (x + 2)(-x-3) + 3x²
= -x² -3x -2x -6 +3x²
= 2x² -5x -6
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Réponse :
Explications étape par étape :
A = (4x-1)(6 - 3x)
=24x -12x² -6 +3x
= -12x² +27x -6
B = (x-2)(x + 7) + x²
= x² +7x -2x -14 +x²
= 2x² +5x -14
C = 2x² + (x-4)(3-X)
= 2x² +3x -x² -12 +4x
= x² +7x -12
D = x(x-1)-3(x + 1)
= x² -x -3x -3
= x² -4x -3
E = (x + 2)(-x-3) + 3x²
= -x² -3x -2x -6 +3x²
= 2x² -5x -6