00:01
All right.
00:03
Suppose the demand function for a commodity is given by this equation.
00:08
And we have p.
00:12
I'm not sure if this is, is it p squared or p sub 2.
00:15
I'm going to assume p squared.
00:18
So we have p squared plus 16q is equal to 1 ,600.
00:28
And this was the demand function.
00:35
Let's just write demand.
00:37
All right.
00:42
And then the supply function is given by 900 minus p squared plus 4q is equal to zero.
00:57
Solve the supply equation for p squared.
01:01
Okay, so all we have to do here is subtract 4q from both.
01:08
Actually, it would be a little bit easier if we just add p squared to both sides.
01:13
Add p squared plus p squared.
01:16
So we get p squared is equal to 900 plus 4q.
01:22
So there's p squared.
01:25
So now we're going to substitute it back into our other equation and solve for q.
01:29
So we get, we're just going to take this, 900.
01:33
We're going to plug it in right there.
01:36
So we get 900 plus 4q plus 16 q is equal.
01:43
To 1600.
01:45
We'll subtract 900 from both sides.
01:49
And i'm going to go ahead and combine those like terms...