计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x
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![计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x](/uploads/image/z/74527-7-7.jpg?t=%E8%AE%A1%E7%AE%97%E2%91%A0x%26%23178%3B-4%EF%BC%8Fx%26%23178%3B-4x%2B3%C3%B7x%26%23178%3B%2B3x%2B2%EF%BC%8Fx%26%23178%3B-x%E2%91%A12x%2B6%EF%BC%8F4-4x%2Bx%26%23178%3B%C3%B7%28x%2B3%29%C2%B7x%26%23178%3B%2Bx-6%EF%BC%8F3-x)
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x
计算①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x
①x²-4/x²-4x+3÷x²+3x+2/x²-x
=(x²-4)/(x²-4x+3)÷(x²+3x+2)/(x²-x)
=(x-2)(x+2)/(x-1)(x-3)÷(x+1)(x+2)/x(x-1)
=x(x-2)(x+2)(x-1)/[(x-1)(x-3)(x+1)(x+2)]
=(x²-2x)/(x²-2x-3)
②2x+6/4-4x+x²÷(x+3)·x²+x-6/3-x
=2(x+3)/(2-x)²÷(x+3)*(x+3)(x-2)/(3-x)
=(2x+3)/(-x²+5x-6)