计算题.m²-4n²分之m²-mn÷m²-2mn分之m-n.2x分之5x-3÷3分之25x²-9×x分之5x+3.x﹙3a+2﹚分之5a+b×25a²-b²分之4x²-9a²x².
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![计算题.m²-4n²分之m²-mn÷m²-2mn分之m-n.2x分之5x-3÷3分之25x²-9×x分之5x+3.x﹙3a+2﹚分之5a+b×25a²-b²分之4x²-9a²x².](/uploads/image/z/2769955-43-5.jpg?t=%E8%AE%A1%E7%AE%97%E9%A2%98.m%26%23178%3B%EF%BC%8D4n%26%23178%3B%E5%88%86%E4%B9%8Bm%26%23178%3B%EF%BC%8Dmn%C3%B7m%26%23178%3B%EF%BC%8D2mn%E5%88%86%E4%B9%8Bm%EF%BC%8Dn.2x%E5%88%86%E4%B9%8B5x%EF%BC%8D3%C3%B73%E5%88%86%E4%B9%8B25x%26%23178%3B%EF%BC%8D9%C3%97x%E5%88%86%E4%B9%8B5x%EF%BC%8B3.x%EF%B9%993a%EF%BC%8B2%EF%B9%9A%E5%88%86%E4%B9%8B5a%EF%BC%8Bb%C3%9725a%26%23178%3B%EF%BC%8Db%26%23178%3B%E5%88%86%E4%B9%8B4x%26%23178%3B%EF%BC%8D9a%26%23178%3Bx%26%23178%3B.)
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计算题.m²-4n²分之m²-mn÷m²-2mn分之m-n.2x分之5x-3÷3分之25x²-9×x分之5x+3.x﹙3a+2﹚分之5a+b×25a²-b²分之4x²-9a²x².
计算题.m²-4n²分之m²-mn÷m²-2mn分之m-n.
2x分之5x-3÷3分之25x²-9×x分之5x+3.
x﹙3a+2﹚分之5a+b×25a²-b²分之4x²-9a²x².
计算题.m²-4n²分之m²-mn÷m²-2mn分之m-n.2x分之5x-3÷3分之25x²-9×x分之5x+3.x﹙3a+2﹚分之5a+b×25a²-b²分之4x²-9a²x².
m²-4n²分之m²-mn÷m²-2mn分之m-n
=m(m-n)/(m+2n)(m-2n)×m(m-2n)/(m-n)
=m²/(m+2n)
2x分之5x-3÷3分之25x²-9×x分之5x+3.
=(5x-3)/2x×3/(5x+3)(5x-3)×(5x+3)/x
=3/2x²
x﹙3a+2﹚分之5a+b×25a²-b²分之4x²-9a²x².
=(5a+b)/x(3a+2)×x²(2+3x)(2-3x)/(5a+b)(5a-b)
=x(2-3a)/(5a-b)