因式分解解方程:3(1/2-x²)-5(x-1/2)-2=0
问题描述:
因式分解解方程:3(1/2-x²)-5(x-1/2)-2=0
答
应该是3(1/2-x)²-5(x-1/2)-2=0
则3(x-1/2)²-5(x-1/2)-2=0
[3(x-1/2)+1][(x-1/2)-2]=0
(3x-1/2)(x-5/2)=0
x=1/6,x=5/2