Answer:
y = x² - 2x - 80
Explanation:
given a polynomial with zeros x = a and x = b , then the factors are
(x - a) and (x - b)
the polynomial is then the product of the factors, that is
y = (x - a)(x - b)
given zeros x = - 8 and x = 10, then the factors are
(x - (- 8) ) and (x - 10) , that is (x + 8) and (x - 10)
the polynomial is then
y = (x + 8)(x - 10) ← expand factors using FOIL
y = x² - 2x - 80