Question

Решите уравнение
$sqrt{ {2x}^{2} + 7 } - 2 = x$

Answer 1

(sqrt(2x^2+7))^2=(x+2)^2
2x^2+7=x^2+4x+4
x^2-4x+3=0
x1=4+2/2=3
x2=4-2/2=1