Х + 2√х - 8 = 0 срочно

Question

Х + 2√х - 8 = 0 срочно

Answer 1

Представим √х как t,
t² + 2t - 8 = 0
t1 + t2 = -2
t1 * t2 = -8
t1 = -4
t2 = 2

x = t²

x1 = 16
x2 = 4