00:01
Okay, so for this problem, we're going to set are you equal to x the power of 5 fourths, and our d .u, in this case, is just x of 5 over 4x, correct, minus 1.
00:14
So we get of 1 over 4 dx.
00:19
And right here, to get rid of this 5 4th, to match it perfectly with this right here, we're just going to multiply by 4 over 5, so we're going to multiply with the reciprocal.
00:27
So we get four fifth, d, u equals to our x, one -fourth, d -x.
00:34
And now that matches perfectly...