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- TheRaggedyDoctor

I need help understanding radicals.

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- TheRaggedyDoctor

I need help understanding radicals.

- chestercat

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- anonymous

An nth root.
A radical expression involving roots.
The radical symbol (√), used to indicate the square root and other roots.
Radical of an algebraic group, a concept in algebraic group theory.
Radical of an ideal, an important concept in abstract algebra.

- TheRaggedyDoctor

Um.. what am I supposed to know with that?

- TheRaggedyDoctor

That doesn't help me solve them.

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- skullpatrol

Please post a specific question involving them that you do not understand :)

- TheRaggedyDoctor

It's not really a specific one, though. It's just the concept of radicals that I don't understand.

- skullpatrol

They are an extension of the idea of positive and negative integer exponents generalized to include fractions.

- UsukiDoll

one rule is that we can NEVER have negative signs inside the radical... that produces an imaginary number.

- welshfella

when simplifying radical expression treat the radical like a variable:-
3x + 2x = 5x
3 sqrt2 + 2 sqrt2 = 5 sqrt2

- skullpatrol

$$\Huge a^{-n}=\dfrac{1}{a^n}$$ this^ extends the idea of positive integer exponents to includes the negative integers, right?

- skullpatrol

"the concept of radicals" is to go one more step and let n be a fraction :)

- skullpatrol

http://en.wikipedia.org/wiki/Nth_root

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