ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos

SAT Math 4.3 Algebra and Functions 217 Views


Share It!


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.

Up Next

SAT Math 2.1 Geometry and Measurement
2779 Views

SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?

Related Videos

SAT Math 9.4 Algebra and Functions
1300 Views

SAT Math 9.4 Algebra and Functions

SAT Math 9.2 Algebra and Functions
377 Views

SAT Math 9.2 Algebra and Functions

SAT Math: Identifying an Equation for the Average of Two Percentages
23 Views

In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...

SAT Math: Which Equation Represents Profit?
13 Views

Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...