解一元二次方程练习题及答案x*x+2x=36

问题描述:

解一元二次方程练习题及答案
x*x+2x=36

x²+2x-36=0
x={-2±根号[2²-4×1×(-36)]}/(2×1)
=(-2±2根号37)/2=-1±根号37
x1=-1+根号37,x2=-1-根号37