(t+2)²+(t-2)²=8(t²+1) 解方程跪求该题答案....

(t+2)²+(t-2)²=8(t²+1) 解方程
跪求该题答案....

2(t^2+4)=8(t^2+1)
t^2+4=4t^2+4
3t^2=0
t=0

t²+4t+4+t²-4t+4=8t²+1
2t²+8 =8t²+1
7 =6t²
t² =7/6
t =√ 42/6