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ksan99
@ksan99
August 2022
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Решите уравнение:x^2-8x+7=0
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aliakhovskii
Verified answer
X²-8x+7=0
D=b²-4ac=(-8)²-4*1*7=64-28=36
x1=(-b+√D)/2a=(-(-8)+6)/2*1=(8+6)/2=7
x2=(-b-√D)/2a=(-8)-6)/2*1=(-14)/2=-7
Ответ: х=7
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Answers & Comments
Verified answer
X²-8x+7=0D=b²-4ac=(-8)²-4*1*7=64-28=36
x1=(-b+√D)/2a=(-(-8)+6)/2*1=(8+6)/2=7
x2=(-b-√D)/2a=(-8)-6)/2*1=(-14)/2=-7
Ответ: х=7