00:01
Okay, a problem where we are multiplying a binomial times a binomial.
00:05
And the method that we use to solve this is called the foiling method, where f stands for first, o stands for outer, i stands for inner, and l stands for last.
00:18
So f meaning first, you multiply together the first terms in each sequence.
00:23
The coefficients get multiplied first.
00:26
3 times 3, 9.
00:28
X times x is x squared.
00:32
Remember, the product rule of exponents says if you're multiplying terms that have exponents and they have like bases, then you add together your exponents and keep the like base.
00:44
O stands for outer, multiplying the outermost terms of each sequence.
00:49
Again, first the coefficients.
00:51
3 times negative 11, negative 33, because a positive times a negative is a negative.
00:58
Now the variables, x times y, we can't combine those since they're different variables.
01:04
So x, y.
01:07
I stands for inner, the innermost terms of each sequence...