Question

Решите неравенства: (1,8x+1)*(5x-1)-2,2x>9x^2 -4

Answer 1

(1,8x+1)*(5x-1)-2,2x-9x^2+4=0
9x^2-1,8+5x-1-2,2x-9x^2+4=0
2,8x+1,2=0
2,8x=-1,2
x=-3/7

Ответ: x>-3/7