Cool math Prealgebra Help Lessons: Exponents

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Coolmath Prealgebra
Exponents lesson 1 - Remember Exponents? (page 2 of 3) page 1
---- This prealgebra lesson reviews what exponents are and how they work.

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What if x = -2? Be careful!

5x^3 = 5 (-2)^3 = 5 (-2)(-2)(-2) = -40

TRY IT:

Write out what means:

Let x = 2 and simplify:

Let x = -5 and simplify:

Here's something a little messier:

What does this thing mean?

The number hangs around in front... and we can expand out those exponents:

So, why do we have exponents?

Look at this thing!

Continued on the next page

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