Question

What is the sum of 3x^3-2x+8, 2x^2+5x and x^3+2x^2-3x-3 PLEASE HELP

Answer 1

Answer:

The sum of given expressions is $4x^3+4x^2+5$.

Step-by-step explanation:

The given expressions are

$3x^3-2x+8,2x^2+5x,x^3+2x^2-3x-3$

We have find the sum of all these expressions.

$3x^3-2x+8+2x^2+5x+x^3+2x^2-3x-3$

Combine like terms.

$(3x^3+x^3)+(2x^2+2x^2)+(-2x+5x-3x)+(8-3)$

$4x^3+4x^2+(0)+(5)$

$4x^3+4x^2+5$

Therefore the sum of given expressions is $4x^3+4x^2+5$.

Answer 2

When adding/subtracting variables you can only add/subtract those variable that are of the same power....

3x^3-2x+8+2x^2+5x+x^3+2x^2-3x-3

(3x^3+x^3)+(2x^2+2x^2)+(-2x+5x-3x)+(8-3)

4x^3+4x^2+5