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sila51
@sila51
June 2021
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Développer chaque expression en utilisant l'identités remarquable;
a)(x-4)²
c)(x-5)²
d)(x-5)²
e)(5x-1
g)(10-3x)²
h)(7-x)(7+x)
i)(1-y)(1+y)
L)(1-3x)(1+3x)
m)(5b+2)(5b-2)
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maudmarine
Verified answer
a)(x-4)²
= x² - 8x + 16
c)(x-5)²
= x² - 10x + 25
d)(x-5)²
- même que le c
e)(5x-1 -
pas terminé
g)(10-3x)²
= 100 - 60x + 9x²
= 9x² - 60x + 100
h)(7-x)(7+x)
= 49 + 7x - 7x - x²
= - x² + 49
i)(1-y)(1+y)
= 1 + y - y - y²
= - y² + 1
L)(1-3x)(1+3x)
= 1 + 3x - 3x - 9x²
= - 9x² + 1
m)(5b+2)(5b-2)
= 25b² - 10b + 10b - 4
= 25b² - 4
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sila51
merci
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Verified answer
a)(x-4)²= x² - 8x + 16
c)(x-5)²
= x² - 10x + 25
d)(x-5)² - même que le c
e)(5x-1 - pas terminé
g)(10-3x)²
= 100 - 60x + 9x²
= 9x² - 60x + 100
h)(7-x)(7+x)
= 49 + 7x - 7x - x²
= - x² + 49
i)(1-y)(1+y)
= 1 + y - y - y²
= - y² + 1
L)(1-3x)(1+3x)
= 1 + 3x - 3x - 9x²
= - 9x² + 1
m)(5b+2)(5b-2)
= 25b² - 10b + 10b - 4
= 25b² - 4