Question

Your answer should be a polynomial in standard form.
(X - 5)(x - 4) =

Answer 1

x to the second power + 9x + 20

Explanation:

first you distribute (X - 5) to (x - 4)

you get X to the second power and 4x then 5x and 20

add like terms (4x + 5x) your answer should be x to the second power + 9x + 20

Answer 2

Explanation:

Use FOIL method.

(x - 5)(x - 4) = x*x + x*(-4) + (-5)*x + (-5)*(-4)

=x² - 4x - 5x + 20

= x² - 9x + 20