Question

Plot the value(s) on the number line where this function is equal to zero: fx) = (x + 5)(x - 1).​

Answer 1

x = - 5, x = 1

Explanation:

let f(x) = 0 , that is

(x + 5)(x - 1) = 0

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5

x - 1 = 0 ⇒ x = 1

Plot the points - 5 and 1 on the number line