请用三种方法将分式(3x-4)/(x^2-3x+2)化成分子内不含x的若干个代数式的和
3个回答
2013-12-17 · 知道合伙人教育行家
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解法一:(3x-4)/(x²-3x+2)
=[(x-2)+2(x-1)]/(x-2)(x-1)
=1/(x-1)+2/(x-2);
解法二:
(3x-4)/(x²-3x+2)
=[(3x-6)+2]/(x-2)(x-1)
=3(x-2)/(x-2)(x-1)+2/(x-2)(x-1)
= 3/(x-1)+2/(x²-3x+2);
解法三:
(3x-4)/(x²-3x+2)
=[3(x-1)-1]/(x-2)(x-1)
=3/(x-2)-1/(x²-3x+2).
=[(x-2)+2(x-1)]/(x-2)(x-1)
=1/(x-1)+2/(x-2);
解法二:
(3x-4)/(x²-3x+2)
=[(3x-6)+2]/(x-2)(x-1)
=3(x-2)/(x-2)(x-1)+2/(x-2)(x-1)
= 3/(x-1)+2/(x²-3x+2);
解法三:
(3x-4)/(x²-3x+2)
=[3(x-1)-1]/(x-2)(x-1)
=3/(x-2)-1/(x²-3x+2).
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