Question

Use identity to find (x+4)(x+5) *​ With Steps

Answer 1

Answer:

x^2 + 9x + 20

Step-by-step explanation:

(x+a)(x+b) = x^2 + (a+b)x +ab

put the values a-4 , b-5

x^2 + (4+5)x + (4)(5)

x^2 + 9x + 20