Question

2(2x^2-3)^2+7(2x^2-3)+5=0

Answer 1

8x^4 - 10x^2 - 34 = 0
t = x^2
8t^2 - 10t - 34 = 0
D = 100 + 1088 = 1188
x1,2 = 5 +-  в корне 1188/8

Answer 2

Спасибо)