Math Problem Statement

Given f, of, x, equals, minus, 3, x, squared, plus, 10, x, plus, 13f(x)=−3x2+10x+13, find f, of, minus, 1f(−1)

Solution

To find f(1)f(-1) given the function f(x)=3x2+10x+13f(x) = -3x^2 + 10x + 13, you need to substitute x=1x = -1 into the function.

Step-by-Step Solution:

  1. Start with the function: f(x)=3x2+10x+13f(x) = -3x^2 + 10x + 13

  2. Substitute x=1x = -1 into the function: f(1)=3(1)2+10(1)+13f(-1) = -3(-1)^2 + 10(-1) + 13

  3. Calculate each term:

    • (1)2=1(-1)^2 = 1
    • 3×1=3-3 \times 1 = -3
    • 10×(1)=1010 \times (-1) = -10
    • 1313 remains as is.
  4. Combine these values: f(1)=310+13f(-1) = -3 - 10 + 13

  5. Simplify: f(1)=13+13=0f(-1) = -13 + 13 = 0

So, f(1)=0f(-1) = 0.

Would you like a detailed explanation or have any questions? Here are some related questions you might consider:

  1. How would the result change if x=2x = 2?
  2. What is the vertex of the parabola represented by f(x)f(x)?
  3. How can you determine the x-intercepts of f(x)f(x)?
  4. What is the axis of symmetry for the function f(x)f(x)?
  5. How does the sign of the coefficient of x2x^2 affect the shape of the graph?

Tip: Always double-check your substitutions and arithmetic when working with functions to avoid simple mistakes.

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Math Problem Analysis

Mathematical Concepts

Quadratic Equations
Substitution
Arithmetic Operations

Formulas

Quadratic equation formula ax^2 + bx + c = 0

Theorems

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Suitable Grade Level

Grades 7-9