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kozhukhovamash
@kozhukhovamash
August 2022
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ПОЖАЛУЙСТА РЕШИТЕ 2 ДРОБНЫХ УРАВНЕНИЯ ЧЕРЕЗ ДИСКРИМИНАНТ
1)x^2/x^2-9=x/x^2-9
2)x/x+10=1/x-8
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WRTLN
2)x/x+10=1/x-8
x^2-8x=x+10
x^2-9x-10=0
D=81+40=121
x1=-1
x2=10
1)x^2/x^2-9=x/x^2-9
x^4-9x^2=x^3-9x
x^2(x^2-9)=x(x^2-9)
x^2(x^2-9)-x(x^2-9)=0
(x^2-9)(x^2-x)=0
x^2=9 x=±3
x^2-x=0
x(x-1)=0
x=0 x=1
2 votes
Thanks 1
kozhukhovamash
спасибо
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Answers & Comments
x^2-8x=x+10
x^2-9x-10=0
D=81+40=121
x1=-1
x2=10
1)x^2/x^2-9=x/x^2-9
x^4-9x^2=x^3-9x
x^2(x^2-9)=x(x^2-9)
x^2(x^2-9)-x(x^2-9)=0
(x^2-9)(x^2-x)=0
x^2=9 x=±3
x^2-x=0
x(x-1)=0
x=0 x=1