Question

What is the value of -3x^2 - 2x -9 when x= -2

Answer 1

-17

Explanation:

Hi there!

`-3x^2 - 2x -9`

Replace x with -2:

`=-3(-2)^2 - 2(-2) -9\\=-3(4) - (-4) -9\\=-12 +4-9\\= -17`

I hope this helps!

Answer 2

-17

Explanation:

given:

-3x^2 - 2x -9 when x= -2

rewriting so it's easier to view:

`-3x^2 - 2x -9`

substituting:

`-3(-2)^2 - 2(-2) -9`

simplifying step-by-step:

`-3(4) - 2(-2) -9`

`-12 - 2(-2) -9`

`-12 +4 -9`

`-8-9`

-17

Hope this helps, have a nice day! :D