1.约分:a²-3a+2/a²-4a+3 2.化简:(1)3+2x-x²/x²-7x+12 (2)二分之一x3.如果x/2=y/3=z/4≠0,那么x+y+z/x+y+z的值是:A .7 B.8 C.9 D.10
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![1.约分:a²-3a+2/a²-4a+3 2.化简:(1)3+2x-x²/x²-7x+12 (2)二分之一x3.如果x/2=y/3=z/4≠0,那么x+y+z/x+y+z的值是:A .7 B.8 C.9 D.10](/uploads/image/z/245526-6-6.jpg?t=1.%E7%BA%A6%E5%88%86%EF%BC%9Aa%26sup2%3B-3a%2B2%2Fa%26sup2%3B-4a%2B3+2.%E5%8C%96%E7%AE%80%EF%BC%9A%EF%BC%881%EF%BC%893%2B2x-x%26sup2%3B%2Fx%26sup2%3B-7x%2B12+%EF%BC%882%EF%BC%89%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80x3.%E5%A6%82%E6%9E%9Cx%2F2%3Dy%2F3%3Dz%2F4%E2%89%A00%EF%BC%8C%E9%82%A3%E4%B9%88x%2By%2Bz%2Fx%2By%2Bz%E7%9A%84%E5%80%BC%E6%98%AF%EF%BC%9AA+.7+B.8+C.9+D.10)
1.约分:a²-3a+2/a²-4a+3 2.化简:(1)3+2x-x²/x²-7x+12 (2)二分之一x3.如果x/2=y/3=z/4≠0,那么x+y+z/x+y+z的值是:A .7 B.8 C.9 D.10
1.约分:a²-3a+2/a²-4a+3 2.化简:(1)3+2x-x²/x²-7x+12 (2)二分之一x
3.如果x/2=y/3=z/4≠0,那么x+y+z/x+y+z的值是:
A .7 B.8 C.9 D.10
1.约分:a²-3a+2/a²-4a+3 2.化简:(1)3+2x-x²/x²-7x+12 (2)二分之一x3.如果x/2=y/3=z/4≠0,那么x+y+z/x+y+z的值是:A .7 B.8 C.9 D.10
1、a²-3a+2/a²-4a+3 =(a-2)(a-1)/(a-3)(a-1)=(a-2)/(a-3)
2 、 3+2x-x²/x²-7x+12 =-(x-3)(x+1)/(x-3)(x-4)=-(x+1)/(x-4)
1、a²-3a+2/a²-4a+3=(a-1)(a-2)/(a-1)(a-3)=(a-2)/(a-3)
(1)、3+2x-x²/x²-7x+12=(3-x)(1+x)/(x-3)(x-4)=(1+x)/(4-x)
(2)、
1、a²-3a+2/a²-4a+3 =(a-1)(a-2)/[(a-1)(a-3)]=(a-2)/(a-3)
2、3+2x-x²/x²-7x+12 =-(a-3)(a+1)/[(a-3)(a+4)]=-a+1/a+4
(a^2-3a+2)/(a^2-4a+3)=(a-2)(a-1)/[(a-3)(a-1)]=(a-2)/(a-3)
(3+2x-x^2)/(x^2-7x+12)=-(x-3)(x+1)/[(x-3)(x-4)]=-(x+1)/(x-4)=(x+1)/(4-x)