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f(x) = 4x^2+ 7x – 18
f(-9)

Sagot :

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Answer:

f(-9) = 243

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Algebra I

  • Function Notation

Step-by-step explanation:

Step 1: Define

f(x) = 4x² + 7x - 18

f(-9) is x = -9

Step 2: Evaluate

  1. Substitute in x:                                                                                                f(-9) = 4(-9)² + 7(-9) - 18
  2. Evaluate Exponents:                                                                                      f(-9) = 4(81) + 7(-9) - 18
  3. Multiply:                                                                                                           f(-9) = 324 - 63 - 18
  4. Subtract:                                                                                                           f(-9) = 261 - 18
  5. Subtract:                                                                                                            f(-9) = 243
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