Question

What is (x-7)(x+7)

Answer 1

Use
\[
a^2 - b^2 =(a-b)(a+b)
\]

Answer 2

Do you know how to continue from here?

Answer 3

Use a=x and b=7

Answer 4

a polynomial

Answer 5

So
\[
(x-7)(x+7)=x^2 -49
\]

Answer 6

is it x^2-14x-49 or is it x^2+14x-49

Answer 7

This site might help you understand how to manipulate these types of equations: http://www.algebrahelp.com/lessons/simplifying/foilmethod/

Answer 8

\[
(x-7)(x+7)=x^2 -49
\]
The answer is
\[
x^2 -49
\]

Answer 9

thanks

Answer 10

Sorry it's (x+10)^2