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Algebra and Functions Videos 140 videos

SAT Math 1.2 Algebra and Functions
359 Views

SAT Math: Algebra and Functions Drill 1, Problem 2. Based on the data in the table, what is the maximum heart rate for the average 22-year-old?

SAT Math 1.3 Algebra and Functions
220 Views

SAT Math 1.3 Algebra and Functions. How many 16 oz. bottles did she buy?

SAT Math 1.4 Algebra and Functions
207 Views

SAT Math 1.4 Algebra and Functions. Solve for x.

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SAT Math 4.3 Algebra and Functions 218 Views


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Description:

SAT Math 4.3 Algebra and Functions

Language:
English Language

Transcript

00:02

And here's your math-y shmoop du jour...

00:05

If 3x squared + 2x all over 3x + 2 = 1, then x is equal to which of the following?

00:12

And here are the potential answers...

00:16

It's asking us to find what x equals to make this equation true.

00:20

This looks like a pretty messy equation...so we gotta simplify things first.

00:24

The numerator looks like it can be factored into x times 3x + 2.

00:29

Hey look... 3x + 2 is in the numerator and denominator...

00:34

...which means we can cancel those two out for all x's as long as 3x + 2 isn't zero.

00:40

3x + 2 is zero when x equals -2/3.

00:44

...so we have to remember that -2/3 is not a valid solution.

00:48

We're left with x equals one... ...and it looks like the answer is (C).

00:59

Ah, the truth has been achieved. We are going to sleep well tonight.

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