Question

Решите неравенство (x+1)^2>4x

Answer 1

(x+1)^2>4x

x^2+1>4x

x^2-4x+1>0

x^2-4x+1=0

D=(-4)^2-4*1*1=16-4=12

x1,2=4+-12/2

x1=4+12/2=8

x2=4-12/2=-4

Ответ: 8; -4

Answer 2

(x+1)^2>4x
x∈(-∞, 1)⋃(1, ∞)