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mel-nik [20]
3 years ago
10

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

Mathematics
1 answer:
Sliva [168]3 years ago
7 0

Answer:

- 14

Step-by-step explanation:

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

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