00:01
We're going to take a look at finding the perimeter of this triangle in simplest form, and then completely factoring what we get.
00:10
So remember what the word perimeter means.
00:13
Perimeter means add up all the outside of our shape.
00:16
So in this case, we got 3x squared plus 1.
00:23
We have an x squared plus 15x.
00:29
We have a 6x plus 4.
00:33
Okay, we're going to combine our leg terms.
00:35
So i got a 3x squared, a 1.
00:37
Squared giving me a 4x squared i have a 15x and a 6x which is 21x i have a 1 and a 4 making that i'm sorry 1 before making that 5 i now we have a trino meal here a quadratic trinole meal that we have to factor completely so i'm going to use my method called factor by grouping all abbreviated as fbg factor by grouping where you take your a term and your c and multiply them together.
01:15
So i have four times five and give me 20.
01:17
What that helps me do is write this trinomeo without that larger than one a coefficient.
01:23
And now i can just factor this trinomeo like i normally would.
01:27
I can factor my x squared into an x and an x.
01:31
I can factor my 20 to two numbers that multiply into 20 that add to 21...