ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Factoring Videos 19 videos
ACT Math Intermediate Algebra Drill 1, Problem 4. Solve for x based on the equation.
SAT Math 4.3 Algebra and Functions 218 Views
Share It!
Description:
SAT Math 4.3 Algebra and Functions
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.
Full Transcript
- 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.
Related Videos
SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?
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...
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...