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bocharova44
@bocharova44
August 2022
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(х-9)^2=4 решить уравнение
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danqs
Verified answer
X²-18x+81=4
x²-18x+77=0
D=b²-4ac
D=18²-4*77=324-308=16
x1=(-b+√D)/2a=(18+4)/2=11
x2=(18-4)/2=7
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Answers & Comments
Verified answer
X²-18x+81=4x²-18x+77=0
D=b²-4ac
D=18²-4*77=324-308=16
x1=(-b+√D)/2a=(18+4)/2=11
x2=(18-4)/2=7