Question

What are the roots of the quadratic function f(q) = q^2- 125?

Answer 1

q = ± 5
`√(5)`

Explanation:

f(q) = q² - 125

to find the roots , let f(q) = 0 , that is

q² - 125 = 0 ( add 125 to both sides )

q² = 125 ( take square root of both sides )

q = ±
`√(125)` = ±
`√(25(5))` = ± (
`√(25)` ×
`√(5)` ) = ± 5
`√(5)`