Question

An expression is shown.

x³ + 2x² - 7x + 3x² + x³ - X
Given that x does not = 0, which of the following is equivalent to the expression?

Select one:

A. 2x³ + 5x² - 8x
B. −x^12
C. x³ + x²- x
D. x²+ x -1

Answer 1

A:
`2x^3+5x^2-8x`

Explanation:

In order to get the answer to this, you have to combine like terms to simplify the answer.

Go through and organize the x's by the size of the exponents. (this step isn't necessary but it can help you visualize it if you are having trouble with that)

`x^3+x^3+2x^2+3x^2-7x-x`

When the variables are raised to the same degree, the coefficients can be added together.

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