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svlad2 [7]
2 years ago
11

F (x) = x^2 + 4x; Find f (−7)

Mathematics
1 answer:
elena-14-01-66 [18.8K]2 years ago
4 0

Answer:

f(-7) = 21

General Formulas and Concepts:

<u>Pre-Alg</u>

  • Order of Operations: BPEMDAS

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = x² + 4x

f(-7) is x = -7

<u>Step 2: Solve</u>

  1. Substitute:                    f(-7) = (-7)² + 4(-7)
  2. Evaluate:                       f(-7) = 49 + 4(-7)
  3. Multiply:                        f(-7) = 49 - 28
  4. Subtract:                       f(-7) = 21
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Answer:

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Step-by-step explanation:

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