Write a quadratic function with zeros –9 and –4.

Question

Write your answer using the variable x and in standard form with a leading coefficient of 1.

Answer 1

The quadratic function with zeros –9 and –4 can be written as:

f(x) = (x + 9)(x + 4)
f(x) = x^2 + 13x + 36

Therefore, the quadratic function in standard form with a leading coefficient of 1 is:

f(x) = x^2 + 13x + 36