分式通分..4m平方-9分之2mn 与 2m+3分之2m-3..请写出过程.

网友回答

2mn/(4m^2-9)
(2m-3)/(2m+3)
分子分母同时乘(2m-3)
=(2m-3)(2m-3) / (2m+3)(2m-3)
=(4m^2-12m+9)/(4m^-9)
======以下答案可供参考======
供参考答案1:
2mn/(4m²-9) (2m-3)/(2m+3)
=2mn/[(2m+3)(2m-3)]
所以 他们的公分母为 (2m+3)(2m-3)
所以(2m-3)/(2m+3)
=(2m-3)²/[(2m-3)(2m+3)]
供参考答案2:
2mn/(4m²-9) (2m-3)/(2m+3)
=2mn/[(2m+3)(2m-3)]
所以 他们的公分母为 (2m+3)(2m-3)
所以(2m-3)/(2m+3)
=(2m-3)²/[(2m-3)(2m+3)]
供参考答案3:
如图 分式通分..4m平方-9分之2mn 与 2m+3分之2m-3..请写出过程.(图1)