Question

FAN AND MEDAL!!!!!!!!!!!!
Determine which polynomial is a difference of two squares.
x2 + 14
x2 - 14
x2 + 49
x2 - 49

Answer 1

Diffrence means subtraction so which can we eliminate?

Answer 2

the last one idk

Answer 3

Well thats the right answer :P but do you know why? .-.

Answer 4

no

Answer 5

http://www.mathsisfun.com/definitions/difference-of-squares.html

Answer 6

the answer is the last one right?

Answer 7

hello?

Answer 8

Yes, \[x^2-49 \implies (x+7)(x-7)\]

Answer 9

thanks