来自李尚平的问题
解方程:(1)3x−1=5x+1(2)7x2+x+1x2−x=6x2−1
解方程:
(1)3x−1=5x+1
(2)7x2+x+1x2−x=6x2−1
1回答
2020-05-15 01:47
解方程:(1)3x−1=5x+1(2)7x2+x+1x2−x=6x2−1
解方程:
(1)3x−1=5x+1
(2)7x2+x+1x2−x=6x2−1
(1)方程两边同乘(x+1)(x-1),得3(x+1)=5(x-1),整理得3x+3=5x-5,解得:x=4.检验:将x=4代(x+1)(x-1)≠0.∴x=4是原方程的解(2)方程两边同乘x(x+1)(x-1),得:7(x-1)+(x+1)=6x,整理得:8x...