分式乘除练习题1.x分之42(x²-y²)乘以35(y-x)分之负的x²
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![分式乘除练习题1.x分之42(x²-y²)乘以35(y-x)分之负的x²](/uploads/image/z/5434008-24-8.jpg?t=%E5%88%86%E5%BC%8F%E4%B9%98%E9%99%A4%E7%BB%83%E4%B9%A0%E9%A2%981.x%E5%88%86%E4%B9%8B42%28x%26%23178%3B-y%26%23178%3B%29%E4%B9%98%E4%BB%A535%28y-x%29%E5%88%86%E4%B9%8B%E8%B4%9F%E7%9A%84x%26%23178%3B)
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分式乘除练习题1.x分之42(x²-y²)乘以35(y-x)分之负的x²
分式乘除练习题
1.x分之42(x²-y²)乘以35(y-x)分之负的x²
分式乘除练习题1.x分之42(x²-y²)乘以35(y-x)分之负的x²
x分之42(x²-y²)乘以35(y-x)分之负的x²
-[42(y-x)(x+y)/x]*x^2/35(y-x)
=-6/5 *x(x+y)
将其中一个x约掉,把(x²-y²)看为(x+y)(x-y),与(y-x)约掉并换号,最终结果是5分之(6x²+6xy)