ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Systems of Equations Videos 73 videos
How do you solve a system of linear inequalities? Aw, man...and we thought solving a problem like Maria was tough...
Please note: If starting your own petting zoo, Shmoop recommends you stock it with animals that aren’t quite so likely to bite your hand off. Tha...
SAT Math 7.4 Algebra and Functions 200 Views
Share It!
Description:
SAT Math 7.4 Algebra and Functions
Transcript
- 00:02
Put this in your calculator and shmoop it...
- 00:04
If x squared + 2x is greater than or equal to -3 and is less
- 00:09
than or equal to 3... then x cannot be which of the following?
- 00:12
And here are the potential answers...
- 00:16
Make sure you pay attention to the word CANNOT...
Full Transcript
- 00:19
Here's where they're trying to catch you...
- 00:21
We're looking for the value of x in the answer choices that makes x squared + 2x
- 00:27
OUTSIDE of the range of -3 and 3.
- 00:31
We can go ahead and just plug in the answer choices and see what we get.
- 00:36
(-3)2 + 2(-3) equals 9 minus 6 equals 3. That's true.
- 00:46
(-2)2 + 2(-2) equals 4 minus 4 equals 0. That's inside the range. True.
- 00:53
(0)2 + 2(0) equals 0. True.
- 00:57
(1)2 + 2(1) equals 1 plus 2 equals 3. True. Inside the range.
- 01:03
(3)2, that's 9, + 2(3), that's 6, Ooh, add them together that's 15.
- 01:10
Not even close! Way outside the range over here.
- 01:13
Looks like our answer's E.
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...