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Lena03062001
@Lena03062001
July 2022
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Помогите пожалуйста с 9 примером!!!
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gkrasavin
2/x(x-2)-5/x(x+2)=1/x
2(x+2)-5(x-2)=x²-4/x(x²-4)
2x+4-5x+10-x²+4/x(x²-4) x≠0 x≠2 x≠-2
-x²-3x+18=0
x²+3x-18=0
D=b²-4ac
D=9+72=81
√D=√81=9
x=-3-9/2=-6
x=(-3)+9/2=3
2/x-3-1/x=6/x(x-3)
2x-x+3=6/ x(x-3) x≠0 x≠3
x=6-3
x=3 ( нет решения)
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Answers & Comments
2(x+2)-5(x-2)=x²-4/x(x²-4)
2x+4-5x+10-x²+4/x(x²-4) x≠0 x≠2 x≠-2
-x²-3x+18=0
x²+3x-18=0
D=b²-4ac
D=9+72=81
√D=√81=9
x=-3-9/2=-6
x=(-3)+9/2=3
2/x-3-1/x=6/x(x-3)
2x-x+3=6/ x(x-3) x≠0 x≠3
x=6-3
x=3 ( нет решения)