What is f(–3) for the function f(a) = –2a2

asked Aug 1, 2017 35.8k views

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What is f(–3) for the function f(a) = –2a2 – 5a + 4?

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F(-3) = -2(-3)2 - 5(-3) +4
- 6 x 2 -15 + 4
- 12 -15 +4
- 27 + 4
-23

I believe this is how to solve the equation. I could be wrong.

Agares answered Aug 3, 2017

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2 votes

Its easy
just substitute (-3) in the place of 'a'.

f(-3) = -2(-3)^2 - 5(-3) +4
= -18 + 15 + 4
= 1

I hope this helped :D

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