【解分式方程】(x+2)分之(x-2)=(x²-4)分之3 + 1 1.2x分之50.4 - x分之26 = 8

问题描述:

【解分式方程】(x+2)分之(x-2)=(x²-4)分之3 + 1 1.2x分之50.4 - x分之26 = 8
【解分式方程】
(x+2)分之(x-2)=(x²-4)分之3 + 1
1.2x分之50.4 - x分之26 = 8
【化简】
(x-3)分之1-(x+3)分之1

(x+2)分之(x-2)=(x²-4)分之3 + 1
乘以(x+2)(x-2)得
(x-2)²=3+x²-4
x²-4x+4=3+x²-1
-4x=3-1-4
-4x=-2
x=½
1.2x分之50.4 - x分之26 = 8
x分之42- x分之26 =8
x分之16 =8
x=2
3.(x-3)分之1-(x+3)分之1
=(x+3)/(x²-9)-(x-3)/(x²-9)
=6/(x²-9)第一题(x²-4)分之3和1是分开的..(x+2)分之(x-2)=(x²-4)分之3 + 1乘以(x+2)(x-2)得(x-2)²=3+x²-4x²-4x+4=3+x²-4-4x=3-4-4-4x=-5x=0.8