решите √33-8x=x

Question

решите

√33-8x=x

Answer 1

(√33-8x=x)^2

33-8x=x^2

 -x2 - 8x + 33 = 0
D = b2 - 4ac
D = 64 + 132 = 196 = 14^2

x1,2 = -b ± √D/2a
x1 = 8 + 14/-2 = - 22/2= -11
x2 = 8 - 14/-2 = 6/2 = 3
Ответ:  x2 = 3