How do you factor the expression #x^2- 16#?

1 Answer
Jan 3, 2016

Answer:

(x - 4 )(x + 4 )

Explanation:

this expression is a difference of 2 squares thus called since # x^2 # is a perfect square and 16 is a perfect square and they are separated by a - ( difference )

to factor this we require the√ #x^2# # = x# and √16 = 4

so # x^2 - 16 = (x - 4 )(x + 4 )