Question

Choose the correct sum of the polynomials (3x3 − 5x − 8) + (5x3 + 7x + 3).

8x3 + 2x + 5
2x3 − 12x − 11
2x3 + 12x − 5
8x3 + 2x − 5

Answer 1

Combine like terms. If you look at the x^3 terms, you can immediately eliminate 2 of the 4 choices.

Then look at the x terms, you should know which answer is correct. Just verify the constant term.

Answer 2

B?

Answer 3

@DebbieG

Answer 4

What is the sum of the cubic terms? Just look at those.... the first terms.

Answer 5

3x^3 + 5x^3 =?

Answer 6

idk what that is?

Answer 7

The terms that have an exponent of 3.

Answer 8

ok

Answer 9

\[3x^3 + 5x^3 =?\]

Answer 10

You can only combine "like terms" of polynomials. Do you know what like terms are?

Answer 11

Stack the like terms up as though it were a decimal addition, then combine the like terms. 

   3x³ -  5x  - 8
+ 5x³ + 7x + 3
--------------
    8x³ + 2x  - 5