解方程x2+5x−6+ 3 x2−8x+5=3x−3.
问题描述:
解方程
+
x2+5x−6
=3x−3.
3 x2−8x+5
答
由方程x2+5x−6+ 3 x2−8x+5=3x−3≥0,∴x≥1,原方程可化为:(x+6)(x−1)+(3x−5)(x−1)=3(x-1),∴x-1=0,x=1,∴x+6+3x−5=3x−1,两边平方整理得,13x2-152x+220=0,∴(13x-22)(x-10)=0,解得...