
3x/(x-3)2-x/3-x
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2011-03-30 · 知道合伙人教育行家
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3x/(x-3)^2 - x/(3-x)
= 3x/(x-3)^2 + x/(x-3)
= x/(x-3) {3/(x-3) + 1}
= x/(x-3) {(3+x-3)/(x-3)}
= x/(x-3) * x/(x-3)
= x^2 /(x-3)^2
= 3x/(x-3)^2 + x/(x-3)
= x/(x-3) {3/(x-3) + 1}
= x/(x-3) {(3+x-3)/(x-3)}
= x/(x-3) * x/(x-3)
= x^2 /(x-3)^2
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