Question

add the polynomial:(x^3-2x^2-9), (x^2+2x^3+9)​

Answer 1

Answer:

4x3-2x2+2x

Step-by-step explanation:

−x3−2x2−9

5x3              +9+2x

___________________

4x3−2x2+0+2x

___________________

⇒4x3−2x2+2x.

Answer 2

Answer:

= (x³ – 2x² –9) + (x² + 2x³ +9)

on rearranging the terms we have

= x³ + 2x³ – 2x² + x² – 9 + 9

= 3x³ –x² +0

= 3x³ – x²

= x²(3x–1)