Question

2x^2-10=40
Resolva a equação

Answer 1

Resposta:

$2x {}^{2} - 10 = 40 \\ 2x {}^{2} = 40 + 10 \\ 2x {}^{2} = 50 \\ x {}^{2} = 25 \\ x = + 5 \\ x = - 5 \\ x = 5 \\ x1 = - 5 \: \: \: \: x2 = 5$