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You will need to learn the exponent rules in preparation for the SAT. http://www.preppedandpolished.com Alexis Avila Founder of Prepped & Polished, LLC in South Natick, Massachusetts, teaches you the exponent rules and shows you the four common mistakes many people make with exponent rules.
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Full Word-for-Word Transcription
Sometimes, students make this mistake: If you have division with exponents.
If you have the same base for a numerator and denominator, but it’s X6 /
X3. Sometimes, students will say, “I’m just going to divide those
exponents.” What they say wrong is they’ll say it’s X6/3. X6/3 = X2. That
is completely wrong, do not do that. What you want to do when you divide
exponents, you subtract the exponents from one another. X6 / X3 is the same
thing as X6-3; X3, final answer.
One last error I want to show you, that students often make, is if you have
(2X)3. What students often do wrong is they will only apply the exponent to
the X. They’ll say “That is 2X3, final answer.” That is completely false.
Do not do that. What you’re going to do is apply the exponent to each
entity in the parentheses. The answer to (2X)3 is the same thing is 23 x X3
= 8X3, final answer.
Just go over those 4 rules I taught you, and you shouldn’t make any
careless mistakes when you see an exponent problem on the SAT. Good luck on
your test. I’ll talk to you soon.
Do the exponent rules confuse you? Which of the exponent rules trips you up the most?
Post your tips/comments below.
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very nice video! This video has helped me alot in avoiding SAT math exponent rule mistakes. I must say every one should see this video and i’m sure they will also get help in avoiding SAT math exponent rule mistakes.
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