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Math Videos 1247 videos

Compound Interest
45304 Views

Who wants to be a millionaire? In this video, learn about compound interest, interest rates, and the compound interest formula. You'll be buying th...

ACT Math 5.2 Pre-Algebra
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ACT Math: Pre-Algebra Drill 5, Problem 2. If a and b are prime numbers, how many factors does ab have?

Simplifying Radicals
9741 Views

We don't like knocking people down to size, but we do like simplifying radicals. Join us?

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SAT Math 6.4 Algebra and Functions 486 Views


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Description:

SAT Math 6.4 Algebra and Functions

Language:
English Language

Transcript

00:02

Here's your shmoop du jour...

00:04

A to the power of x + y times a to the power of x - y equals... what?

00:12

And here are the potential answers...

00:16

So this is just a SUPER simple question about exponent rules.

00:23

We are multiplying two exponents with the same base...

00:27

which means we can just ADD our exponents.

00:29

Now if you didn't know that, oh are you screwed.

00:33

X + y + x - y equals... 2x.

00:38

So we have a to the power of 2x.

00:40

And... our answer's C.

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