Question

which polynomial should be added to 3x cube -2x square +3 to get polynomial 3x square +4??

Answer 1

$3 {x}^{2} + 4- 3 {x}^{3} + 2 {x}^{2} - 3 \\ = - 3 {x}^{3} + 5 {x}^{2} + 1$
Hope it will help you