Math Problem Statement

Write a quadratic function with zeros -1 and 6.

Solution

The problem asks you to write a quadratic function with zeros at -1 and 6, using the variable xx and in standard form, with a leading coefficient of 1.

To form the quadratic function from its zeros, we use the fact that if a quadratic function has roots (or zeros) at r1r_1 and r2r_2, the function can be written as:

g(x)=a(xr1)(xr2)g(x) = a(x - r_1)(x - r_2)

Given that the zeros are 1-1 and 66, and the leading coefficient a=1a = 1, the function becomes:

g(x)=(x+1)(x6)g(x) = (x + 1)(x - 6)

Now, expand this expression:

g(x)=(x+1)(x6)=x26x+x6=x25x6g(x) = (x + 1)(x - 6) = x^2 - 6x + x - 6 = x^2 - 5x - 6

Thus, the quadratic function is:

g(x)=x25x6g(x) = x^2 - 5x - 6

Would you like more details, or do you have any questions?

Here are 5 questions for further practice:

  1. What is the quadratic function with zeros at 3 and -2?
  2. How would you factor the quadratic x2+2x8x^2 + 2x - 8?
  3. What is the vertex of the function g(x)=x25x6g(x) = x^2 - 5x - 6?
  4. How do you find the axis of symmetry of a quadratic function?
  5. How would you graph the function g(x)=x25x6g(x) = x^2 - 5x - 6?

Tip: When you know the roots of a quadratic, you can always write it in factored form and expand to get the standard form.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Factoring

Formulas

Quadratic Function from Zeros: g(x) = a(x - r1)(x - r2)
Standard Form: ax^2 + bx + c

Theorems

Factoring Theorem

Suitable Grade Level

Grades 8-10