I can't listen to the lesson quietly. I fucked my colleague during online classes
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發佈者 Sexycikas
Video Transcription
y cubed times y to the fourth power is y to the seventh, since 3 plus 4 is 7.
So let's try some examples.
Transform 5x cubed y to the fourth times 7x squared y to the eighth.
And then 3xy squared times 5x cubed y.
And also 4x to the fourth y to the ninth of 3 times 5x to the third y to the ninth of fifth.
So 5 times 7 is 35.
x cubed times x squared is x to the fifth power.
And 4y to the fourth times y to the eighth of 4 plus 8 is 12, so it's y to the twelfth power.
Now let's go ahead and make some space.
Let's get rid of that stuff.
Let's move this over here.
3 times 5 is 15.
Now what is x times x cubed?
If you don't see an x point, there is an invisible one.
So it's really 1 plus 3, so it's x to the fourth.
And here this is y squared times y to the first power.
2 plus 1 is 3, so that's going to be y cubed.
Now let's try the last example.
So let's multiply 4 times 5, which is 20.
And then x to the fourth times x to the third, that's x to the seventh power.
And then y to the negative 3 times y to the negative 5.
Negative 3 plus negative 5 is negative 8.
But since we have a negative x point, we can move it to the bottom.
So it's 20x to the seventh divided by y to the eighth power.
So we talked about multiplying on ovals.
We said that x to the fourth times x to the fifth is x to the ninth, because 4 plus 5 is 9.
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