(2x-1)²-(1-3x)²=5(1-x)(x+1)解方程

问题描述:

(2x-1)²-(1-3x)²=5(1-x)(x+1)解方程

(2x-1)²-(1-3x)²=5(1-x)(x+1)
4x²-4x+1-(1-6x+9x²)=5(1-x²)
-5x²+2x=5-5x²
2x=5
x=2.5