Réponse:
A= −16x+19−2x²
b= 47x-25+27x²
C= 25x²−40x+16
D= 9x²-4
E= 16x
F = 8x²−20x+16
Explications étape par étape:
A= −3(2x−5)−(7x−4)−x(2x+3)
= −6x+15−(7x−4)−x(2x+3)
= −6x+15−7x−(−4)−x(2x+3)
= −6x+15−7x+4−x(2x+3)
= −13x+15+4−x(2x+3)
= −13x+19−x(2x+3)
= −13x+19−(2x²+3x)
= −13x+19−2x²−3x
= −16x+19−2x²
B= 7(2x-3)+(3x+4)(9x-1)
14x-21+(3x+4)(9x-1)
14x-21+27x²-3x+36x-4
14x-21+27x²-33x-4
47x-21+27x²-4
47x-25+27x²
C= (5x−4)²
25x²−40x+16
D= (3x−2)(3x+2)
9x²-2²
E= (x+4)²−(x−4)²
x²+8x+16-(x-4)²
x²+8x+16−(x²−8x+16)
x²+8x+16−x²+8x−16
8x+16+8x−16
16x+16−16
16x
F= (2x−5)²+(2x−3)(2x+3)
4x²−20x+25+(2x−3)(2x+3)
4x²−20x+25+(2x)²−9
4x²−20x+25+2²x²−9
4x²−20x+25+4x²−9
8x²−20x+25−9
8x²−20x+16
