Question

докажите неравенства x^2+y^2+18x-6y+100>0
Докажите неравенство (3x-1)(2x-2)>x(6x-8)

Answer 1

2)(3х-1)(2х-2)>х(6х-8)
6х^2-6х-2х-2>6х^2-8х
6х^2-8х-2>6х^2-8х
6х^2-8х-2-6х^2+8х>0
-2>0
0