Question

Resolva:
4(x+1)elevado2=(x-2)elevado 2

Answer 1

Resposta:

$4(x + 1) {}^{2} = (x - 2) {}^{2} \\ 4 {x}^{2} + 8x + 4 = {x}^{2} - 4x + 4 \\ 4 {x}^{2} + 8x = {x}^{2} - 4x \\ 3 {x}^{2} + 12x = 0 \\ 3x(x + 4) = 0 \\ x(x + 4) = 0 \\ x = 0 \\ x + 4 = 0 \\ x = - 4 \\ s = (- 4. \: 0)$