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M0rgane57
@M0rgane57
June 2021
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Bonjour, j'ai besoin d'aide.
C'est un exercice sur la factorisation.
J'aurai besoin d'aide pour faire l'exercice 25 ( uniquement) voir photo
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droopette
Bonjour
25x² -30x +9 = 5x² - 2 x 3 x 5 + 3²
x² +20x +100 = x² + 2 x 10 x x +10²
9x² -1 = 3x +1 x 3x -1
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winner123
Verified answer
A)25x²-30x+9=(5x)²-2*5x*3+(3)²=(5x-3)²
b)x²+20x+100=(x)²+2*x*10+(10)²=(x+10)²
c)9x²-1=(3x)²-1²=(3x+1)(3x-1)
0 votes
Thanks 1
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25x² -30x +9 = 5x² - 2 x 3 x 5 + 3²
x² +20x +100 = x² + 2 x 10 x x +10²
9x² -1 = 3x +1 x 3x -1
Verified answer
A)25x²-30x+9=(5x)²-2*5x*3+(3)²=(5x-3)²b)x²+20x+100=(x)²+2*x*10+(10)²=(x+10)²
c)9x²-1=(3x)²-1²=(3x+1)(3x-1)