Question

Multiply: (x – 4)(x + 5)

Answer 1

It should equal to X^2+x-20
By foiling x*x equals x^2
Then x*5 equals 5x
Then -4*x equals -4x
Then -4*5 equals 20 then combine !

Answer 2

x2 + x - 20

Explanation:

multiply the two : x(x+5) - 4 (x+5)