00:02
Okay, so here we're asked to solve by completing the square.
00:05
The first step to solve by completing the square is to get our variables on one side of the equation and our constants on the other.
00:11
We can do that by subtracting 7b on both sides, 7b, and also subtracting 12 on both sides.
00:19
That's just going to swap our 7b and our 12.
00:23
So we're going to have b squared minus 7b.
00:26
I'm going to plus a blank here for my next step, minus 12 plus a blank.
00:33
So our next step is to divide our negative 7.
00:35
By 2.
00:37
So we're going to have negative 7 halves.
00:40
We're going to square that and add that to both sides of our equation.
00:45
So negative 7 squared is 49 over 2 squared, which is 4.
00:49
So we're going to add 49 fourths to both sides...