Question

Write a quadratic equation with a double root of -5

Answer 1

x² + 10x + 25 = 0

Explanation:

Given that x = - 5 is a root then (x + 5) is a factor

Since it is a double root then (x + 5)² so equation is

(x + 5)² = 0 ← expand factor using FOIL

x² + 10x + 25 = 0

Answer 2

x^2 =5

Explanation: