16(2x-1)方=25(x-2)方用因式分解解方程火速
问题描述:
16(2x-1)方=25(x-2)方
用因式分解解方程
火速
答
[4(2x-1)]²=[5(x-2)]²
(8x-4)²=(5x-10)²
(8x-4)²-(5x-10)²=0
[(8x-4)+(5x-10)][(8x-4)-(5x-10)]=0
(13x-14)(3x+6)=0
x=14/13,x=-2
答
16(2x-1)^2=25(x-2)^2
(8x-4)^2-(5x-10)^2=0
(8x-4-5x+10)(8x-4+5x-10)=10
(3x+6)(13x-14)=0
x=-2,x=14/13