Question

3. Which of the following are the roots of the quadratic function below?

Select all that apply.
f(x) = x2 - 144
12
2

Answer 1

x = ± 12

Explanation:

Given

f(x) = x² - 144

To find the roots set f(x) = 0, that is

x² - 144 = 0 ( add 144 to both sides )

x² = 144 ( take the square root of both sides )

x = ±
`√(144)` = ± 12