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Superwoman12
@Superwoman12
April 2019
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Resoudre:
x²-20x+16=0
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X²-20x+16 = 0
(x-10)²+84 = 0
(x-10-V84)(x-10+V84) = 0
x-10-V84 = 0
x= 10+V84
ou x = 10+2V21 ( car V84 =2V21)
= 2(5+V21)
x-10+V84 = 0
x =10-V84
= 10-2V21
= 2(5-V21)
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(x-10)²+84 = 0
(x-10-V84)(x-10+V84) = 0
x-10-V84 = 0
x= 10+V84
ou x = 10+2V21 ( car V84 =2V21)
= 2(5+V21)
x-10+V84 = 0
x =10-V84
= 10-2V21
= 2(5-V21)