7-(3-t)²=t(6,5-t) уравнение

7-(3-t)²=t(6,5-t)7-(9-6t+t^2)=6.5t-t^27-9+6t-t^2=6.5t-t^27-9+6t=6.5t-2+6t=6.5y6t-6.5t=2-0.5t=2y=-4