Question

Consider the quadratic function: f (x) = 5x2 + 20x + 20. What are the zeros of the function using completing the square?

Answer 1

Explanation:

step 1. f(x) = 5x^2 + 20x + 20

step 2. f(x) = 5(x^2 + 4x + 4)

step 3. f(x) = 5(x + 2)^2

step 4. 0 = 5(x + 2)^2

step 5. zeros: -2