00:01
Here we are multiplying a binomial times a binomial, two terms times two terms.
00:07
When we do that, the method that we use is called the foiling method, where f stands for first, o stands for outer, n stands for inner, and l stands for last.
00:22
So first means we are multiplying the first terms in either sequence together.
00:28
7a times a, 7a squared.
00:33
Remember, product rule says if we have like bases, you add together your exponents.
00:40
Oh, outer.
00:42
7a times negative 7b.
00:45
7 times negative 7 is negative 49.
00:48
A times b is just a, b.
00:54
Inner, b times a...