Question

решите неравенство :(2,5х+3)(4х-1)-2.5х(4х+2)>3

Answer 1

(2.5x+3)*(4x-1)-2.5x(4x+2)<3

10x^2-2.5x+12x-3-10x^-5x<3

-2.5x+12x-5x<3+3

4.5x<+

x<1.(3)

Answer 2

(2,5х+3)(4х-1)-2.5х(4х+2)>3       10х^-2,5х+12х-3-10х^-5х=4,5х-3>3 при х>или=1,4