Question

(T-1)² + (T+2)²-9= 0

Me Ajudem Pfv

Answer 1

T = x
${x}^{2} + 1 + {x}^{2} + 4 - 9 = 0\\ {2x}^{2} = - 1 - 4 + 9 \\ {2x}^{2} = 4 \\ {x}^{2} = \frac{4}{2} \\ {x}^{2} = 2 \\ x = \sqrt{ 2}$