通分(1)4m²-9分之2mn与2m+3分之2m-3
问题描述:
通分(1)4m²-9分之2mn与2m+3分之2m-3
答
4m²-9分之2mn=2mn/(4m²-9)
2m+3分之2m-3=(2m-3)²/(4m²-9)