x²+8x-2=0 x²-x-1=0 2x²-5x+1=0 4x²-2x-1=0用配方法解方程!

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 08:27:08
x²+8x-2=0 x²-x-1=0 2x²-5x+1=0 4x²-2x-1=0用配方法解方程!
x)PS64ֶ55Pru+t <#״B7ϧxlgXx[&H"c0[ΆN m~O' C3]{bZ%"Cu25]Pt}]CQ2&H6-07 "6a6L [dho [1"!#b|d~qAb(#^H

x²+8x-2=0 x²-x-1=0 2x²-5x+1=0 4x²-2x-1=0用配方法解方程!
x²+8x-2=0 x²-x-1=0 2x²-5x+1=0 4x²-2x-1=0
用配方法解方程!

x²+8x-2=0 x²-x-1=0 2x²-5x+1=0 4x²-2x-1=0用配方法解方程!
x²+8x-2=0
(X+4)²-16-2=0
(X+4)²=18
X=±3√2-4
x²-x-1=0
(X-1/2)²-1/4-1=0
(X-1/2)²=5/4
X=±√5/2+1/2
2x²-5x+1=0
2(X-5/4)²-25/8+1=0
2(X-5/4)²=17/8
X=±√14/4+5/4
4x²-2x-1=0
(2X-1/2)²-1/4-1=0
(2X-1/2)²=5/4
X=±√5/4+1/4