x²-2x-2倍根号2x+3+2倍根号2=0 解方程
问题描述:
x²-2x-2倍根号2x+3+2倍根号2=0 解方程
答
x²-2x-2√2x+3+2√2=0
x²-(2+2√2)x+3+2√2=0
[x-(1+√2)]²=0
x-(1+√2)=0
x1=x2=1+√2