⑴方程两边都乘以(X+1)(X-1),得:
2X(X-1)+3(X+1)=2(X+1)(X-1),
2X²-2X+3X+3=2X²-2
X=-5.
⑵方程两边都乘以2(X+2)(X-2),得:
5(X-2)+2(X+2)=8
7X=14,
X=2,
⑶方程两边都乘以(X+1)(X-1),得:
X(X+1)=3,
X²+X-3=0
X=(-1±√13)2.
⑴方程两边都乘以(X+1)(X-1),得:
2X(X-1)+3(X+1)=2(X+1)(X-1),
2X²-2X+3X+3=2X²-2
X=-5.
⑵方程两边都乘以2(X+2)(X-2),得:
5(X-2)+2(X+2)=8
7X=14,
X=2,
⑶方程两边都乘以(X+1)(X-1),得:
X(X+1)=3,
X²+X-3=0
X=(-1±√13)2.