Question

Реши неравенство -(3d+2) +(d-7)<0

Answer 1

-3d-2+d-7{0
-2d}9
d{-4.5

Answer 2

-(3d+2)+(d-7)<0
-3d-2+d-7<0
-2d<9
2d>-9
d>-4,5
Ответ: (-4,5; +∞)