Question

What is the sum of these polynomials?
(4x^3 − 2x − 9) + (2x^3 + 5x + 3)
^ indicates exponent

Answer 1

\[(4x^3 − 2x − 9) + (2x^3 + 5x + 3)\]
Let's open the brackets,
\[4x^3-2x-9+2x^3+5x+3\]
Now, let's group the like terms, that is terms with same powers of x
\[4x^3+2x^3-2x+5x-9+3\]
let's combine the like terms
\[\underline{4x^3+2x^3}-2x+5x-9+3=6x^3-2x+5x-9+3\]Could you take it from here?

Answer 2

yes! thank you so much :)

Answer 3

Did you understand?

Answer 4

yes! I remember lerning this, i just forgot how to do it!