Question

How do you combine (x3+2x−1)+(3x2+4)?

Answer 1

Hey. mate

$( {x}^{3} + 2x - 1) +(3 {x}^{2} + 4) \\ \\ = \geqslant 3 {x}^{5} + 4 {x}^{3} + 6 {x}^{3} + 8x - 3 {x}^{2} - 4 \\ \\ = \geqslant 3 {x}^{5} + 10 {x}^{3} - 3 {x}^{2} + 8x - 4$