x+3分之2加上x-4分之3 帮我
问题描述:
x+3分之2加上x-4分之3 帮我
答
2/(x+3)+3/(x-4)= 2(x-4)/(x+3)(x-4)+3(x+3)/(x-4)(x+3)=
2(x-4)+3(x+3)/(x+3)(x-4)