Question

решите неравенство (2,5х+3)*(4х-1)-2,5х(4х+2)<3

Answer 1

neslojno... otvet tak x<60/45ili12/9. togda (-<>;60/45 ili 12/9)

Answer 2

(2,5х+3)*(4х-1)-2,5х(4х+2)<3

просто раскрыть скобки

10x^2-2,5x+12x-3-10x^2-5x<3

4,5x-3<3

4,5x<6

x<60/45

x<12/9

x<4/3