方程:(240—48)/x+48/(x-10)=240/(x-4)求解
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方程:(240—48)/x+48/(x-10)=240/(x-4)求解
方程:(240—48)/x+48/(x-10)=240/(x-4)求解
方程:(240—48)/x+48/(x-10)=240/(x-4)求解
[(240-48)/x]+[48/(x-10)]=240//(x-4)
[192(x-10)+48x]/x(x-10)=240/(x-4)
240x(x-10)=(x-4)(240x-1920)
x(x-10)=(x-4)(x-8)
x²-10x=x²-12x+32
2x=32
x=16
(240—48)/x+48/(x-10)=240/(x-4)
192/x+48/(x-10)=240/(x-4)
4/x+1/(x-10)=5/(x-4)
4(x-4)(x-10)+x(x-4)=5x(x-10)
4(x²-10x-4x+40)+x²-4x=...
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(240—48)/x+48/(x-10)=240/(x-4)
192/x+48/(x-10)=240/(x-4)
4/x+1/(x-10)=5/(x-4)
4(x-4)(x-10)+x(x-4)=5x(x-10)
4(x²-10x-4x+40)+x²-4x=5x²-50x
4x²-40x-16x+160+x²-4x-5x²+50x=0
-x²-10x+160=0
x²+10x-160=0
(x+5)²=185
x=±√185-5
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