00:01
So we want to find the difference quotient of f of x plus h minus f of x.
00:06
And this is kind of a precursor or a prelude to calculus if we have the f of x function being x squared minus 4.
00:18
So let's find it.
00:20
So we need to plug in place of, in place of x, we need to plug x plus h.
00:27
So we're going to have, on this first one, plugging in place here, we're going to have x plus h quantity squared minus 4.
00:36
That's this first expression, minus f of x, and f of x is the x squared minus 4.
00:46
And then we're going to have h down here in the bottom.
00:49
So again, plugging in place of x, we're plugging in x plus h here, put parentheses around it just so it makes sense...