Question

Can someone please help me with this?

Answer 1

Answer:
`\Large\boxed{f(-9)=-189}`

Explanation:

f(x) = -3x² - 6x

Requirements of the question

Find the value of f(-9)

Substitute values into the given function

f(x) = -3x² - 6x

f(9) = -3 (-9)² - 6 (-9)

Simplify the exponent

f(9) = -3 (81) - 6 (-9)

Simplify by multiplication

f(-9) = (-243) - (-54)

Simplify by subtraction

`\Large\boxed{f(-9)=-189}`

Hope this helps!! :)

Please let me know if you have any questions