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If 9 (x) = – 5x2 – 4x + 19 find f (–3)

If 9 (x) = – 5x2 – 4x + 19 find f (–3)
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1 vote
If 9 (x) = – 5x2 – 4x + 19 find f (–3)

asked
User Esben Skov Pedersen
by
8.8k points

1 Answer

4 votes

Answer:

- 14

Explanation:


f(x) = - 5 {x}^(2) - 4x + 19 \\ plug \: x = - 3 \\ f( - 3) = - 5 {( - 3)}^(2) - 4( - 3) + 19 \\ f( - 3) = - 5 * 9 + 12 + 19 \\ f( - 3) = - 45 + 31 \\ f( - 3) = -14

answered
User Joseph Alcorn
by
8.4k points
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