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CAHSEE Math 1.2 Algebra I 236 Views


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Description:

CAHSEE Math Algebra I: Drill 1, Problem 2. Find the negative reciprocal.

Language:
English Language

Transcript

00:03

Here’s an unshmoopy question to write about in your diary…

00:07

What is the negative reciprocal of negative b over 2a?

00:10

And here are the potential answers…

00:16

So… what is this question asking?

00:18

Can we find a reciprocal? Piece o’ cake.

00:21

A reciprocal, remember, is just the flip-side of a fraction.

00:24

And any normal number, by the way, is a fraction.

00:27

That is, the number 4 is 4 over 1… so its reciprocal is 1 over 4 or one-fourth.

00:36

So do the same here with the fraction given… negative b over 2a.

00:41

BUT it also asks for the NEGATIVE reciprocal. A negative of a negative is a positive…

00:47

and we now have just 2a over b…

00:50

…so the answer is B.

00:52

As in, “Sponsored by Bounty – the quicker picker-upper.”

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