Answer:

there are 3 things you should remember in fdots

-the given is always a binomial

-it should always be subtraction

-the given should always be a perfect square

Step-by-step explanation:

example

1st: find the square root of both terms

9x²-36= (3x-6)

2nd, the subtraction sign will be beside an addition sign like this

(3x-6)(3x+6)

how to check: FOIL METHOD