Factorize x2 + 2x + 8x + 16 by the method of common factors
( x+__)( x+__)
Take common factors out
x2 + 2x + 8x + 16
= x(x + 2) + 8(x + 2)
= (x + 2)(x + 8)
Answers in order are : 2, 8
Find the factors of x2+8x+16 by splitting the middle term.