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Manvelhay1
@Manvelhay1
April 2019
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Bonjours j'ai un exercice de développement pour demain qui peux m'aider svp
Développer et réduire les expressions suivantes.
A = (4x + 5)(3x – 2)
B = (9x – 4)²
C = (5x – 6)(5x + 6) + (x + 7)²
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ayaslimani14
A=12x²-8x+15x-10
=12x²-8x+15x-10
A=12x²+7x-10
B=(9x – 4)² =====> (a-b)²=a²-2ab+b²
=(9x)
²-(2×9x×4)+4²
B=81x²-72x+16
C=
(5x – 6)(5x + 6) + (x + 7)²
=(5x)²-6²+x²+2×x×7+7²
=25x²-36+x²+14x+49
C=26x²+13+14x
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=12x²-8x+15x-10
A=12x²+7x-10
B=(9x – 4)² =====> (a-b)²=a²-2ab+b²
=(9x)²-(2×9x×4)+4²
B=81x²-72x+16
C= (5x – 6)(5x + 6) + (x + 7)²
=(5x)²-6²+x²+2×x×7+7²
=25x²-36+x²+14x+49
C=26x²+13+14x