Question

Which of the following represents the sum of the polynomials below?

Answer 1

Answer:

A

Step-by-step explanation:

First, you have to align the like terms next to each other so that it will be easier to combine like terms. (Like terms have the same variables and powers)

$6x^3+(-2x^3)+2x^2+5x^2+9x+3x$

Combine like terms:

(When combining like terms all you have to do is add/subtract the coefficients, number in front of variables, and leave the variable and exponents)

$6x^3+(-2x^3)= > 6x^3-2x^3=4x^3$

$2x^2+5x^2=7x^2$

$9x+3x=12x$

So, we get $4x^3+7x^2+12x$