化简一元二次方程,
问题描述:
化简一元二次方程,
n^2+(n+1)^2+(n+2)^2=(n+3)^2+(n+4)^2
答
n^2+n^2+2n+1+n^2+4n+4=n^2+6n+9+n^2+8n+16
n^2-8n-20=0
(n-4)^2=36
n=10 或 n=-2