Question

Помогите решить неравенства: а) (2,5х+3)(4х-1)-2,5х(4х+2)<3 б) (1-4х)^2-(8х-1)(2х+1)>0

Answer 1

a) (2,5х+3)(4х-1)-2,5х(4х+2)<3
10x^2-2,5х+12х-3-10x^2-5х<3
4.5x<9
x<2

б)(1-4х)^2-(8х-1)(2х+1)>0
1-8х+16х^2-16x^2-8x+2x+1>0
-14x>-2
x<1/7