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CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
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CAHSEE Math 1.5 Algebra and Functions 218 Views
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Description:
Algebra and Functions: Drill Set 1, Problem 5. Evaluate the expression.
Algebra and Functions: Drill Set 1, Problem 5. Evaluate the expression.
Transcript
- 00:03
And here's another shmoop du jour.
- 00:05
Evaluate the expression 2ab - 3 times the square root of bc... for a = 9, b = 4, and c = 1.
- 00:14
Here are the potential answers...
- 00:16
Hit the pause button and try this thing first yourself.
- 00:20
So, this is just testing whether we can... plug. So... let's.
Full Transcript
- 00:27
If we take the base case equation here...
- 00:29
...and plug in the numbers as noted here...
- 00:31
...we get 2 times 9 times 4 minus 3 times the square root of 4 times 1.
- 00:38
Now let's simplify this mess.
- 00:40
2 times 9 is 18... times 4 is 72... minus 3 times the square root of 4... which is 2...
- 00:47
or 3 times 2, which is 6
- 00:50
So we have 72 minus 6 which is... the devil's number.
- 00:54
Or...D. As in devil.
- 00:55
It's okay. We'll get a priest in here to get this problem exorcised.
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