计算题.m²-4n²分之m²-mn÷m²-2mn分之m-n.
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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.
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)
=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)
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