How do you simplify #(7+ 2v ) ( 7- 2v )#?
2 Answers
Oct 24, 2016
Explanation:
is of the form
Here ,
Oct 24, 2016
Explanation:
If you do not recognise the expression as the difference of squares as explained by Sibi, you will have to remove the brackets by multiplying out (sometimes called the FOIL rule).
IT does not matter which method you use, but it saves a lot of time if you recoznise the short cut.
=
=
=
If the signs in the brackets are different, the two middle terms will always cancel out.