(x−5)(x+5)=

Question

 answer should be a polynomial in standard form

 

Answer 1

FOIL it out, Ma:

 

(x-5)(x+5) = x*x + 5x -5x + (5)(-5)

 

Can you finish it from here?

 

 

Answer 2

Hi Ma,

 

This is the factorized form of the difference of two squares.

Standard form is

(x−5)(x+5) = x^2 - 5^2

= x^2 - 25