Question

Simplify the expression. 3(x + 6x2 − 3x − 3x2)

A. 3x2
B. 15x2
C. 9x2 − 6x
D. 15x2 − 6x

Answer 1

C. 9x^2 − 6x

Explanation:

3(x + 6x^2 − 3x − 3x^2)

According to PEMDAS, we need to simplify inside the parentheses first

3(x -3x+ 6x^2 − 3x^2)

3(-2x+3x^2)

Now we can distribute the 3 to both terms inside the parentheses

3 * -2x + 3* 3x^2

-6x + 9x^2

We normally write them in decreasing powers of x

9x^2 -6x