(3x+7) (3x-7) What Is The Answer Of This

(3x+7) (3x-7) what is the answer of this

 

Answer:

9x^2 - 49

Step-by-step explanation:

(3x + 7)(3x - 7) =

Using the FOIL Method

9x^2 + 21x -21x - 49

9x^2 - 49

But then AT THIS CASE you could just do the short cut

(3x + 7)(3x - 7) =

Just multiply the First and the Last term

9x^2 - 49 is the answer

iF THEY ARE THE SAME AND THE ONLY DIFFERENCE IS THEIR SIGN THEN THAT IS ALL YOU JUST HAVE TO DO