去括號得:-24+x2+4x+3=x2-9,
移項(xiàng)合并得:4x=-12,
解得:x=-3,
經(jīng)檢驗(yàn)x=-3是增根,分式方程無解;
②方程變形得:
1 |
3 |
1 |
x |
1 |
x+3 |
1 |
x+3 |
1 |
x+6 |
1 |
x+6 |
1 |
x+9 |
3 |
2(x+9) |
即
1 |
x |
1 |
x+9 |
9 |
2(x+9) |
去分母得:2(x+9)-2x=9x,
解得:x=2,
經(jīng)檢驗(yàn)x=2是分式方程的解.
24 |
9?x2 |
x+1 |
x?3 |
1 |
x(x+3) |
1 |
(x+3)(x+6) |
1 |
(x+6)(x+9) |
3 |
2x+18 |
1 |
3 |
1 |
x |
1 |
x+3 |
1 |
x+3 |
1 |
x+6 |
1 |
x+6 |
1 |
x+9 |
3 |
2(x+9) |
1 |
x |
1 |
x+9 |
9 |
2(x+9) |