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131alena
@131alena
August 2022
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помогите решить
х^2-x+56=0
x^2-7x+12=0
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MaychaCool
X²-x+56=0
D=b²-4ac=1-4*56=-223
x<0, корней нет
x²-7x+12=0
D=b²-4ac=49-4*12=1
x₁=(-b-√D)/2a=(7-1)/2=6/2=3
x₂=(-b+√D)/2a=(7+1)/2=8/2=4
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Answers & Comments
D=b²-4ac=1-4*56=-223
x<0, корней нет
x²-7x+12=0
D=b²-4ac=49-4*12=1
x₁=(-b-√D)/2a=(7-1)/2=6/2=3
x₂=(-b+√D)/2a=(7+1)/2=8/2=4