00:01
The directions are to solve this equation by factoring.
00:04
So the first step when we're solving an equation by factoring is to get it into standard form, which means put all of the terms on one side and get a zero on the other side.
00:12
So if we subtract 225 from both sides of this equation, that will put this equation into standard form.
00:19
So that gives us 64p squared minus 225 equals zero.
00:24
First step when factoring the left side is to look for a gcf.
00:28
Is there anything we can divide into 64p? p squared that we can also divide into 225 and there is no common factor.
00:36
Since the left side is a binomial, we're going to look for a difference of squares, which this one is, because there's a subtraction sign, which is the difference part, and then the two things on that side are perfect squares.
00:48
So 64 p squared is a perfect square because the square root of that is 8p.
00:54
So that goes there and there.
00:57
The square root of 225 is 15.
01:00
In the last place of each group...