Create a quadratic trinomial with zeros equal to 4 and 5

x^2 - 9x + 20

Step-by-step explanation:

(x - 4) (x - 5) (have to do the opposite for it to be positive)

FOIL method: X x X = x^2

-5 x X = - 5x

-4 x X = - 4x

x^2 - 5x - 4x + 20

-5 - 4 = - 9 so ...

x^2 - 9x + 20 is the answer