Radical Functions Unit 3 Parts of a Radical
- Slides: 18
Radical Functions Unit 3
Parts of a Radical
Radicals Principal root—positive root (for even indexes) For a radical to be completely simplified, (A) all perfect nth root factors should be removed from underneath the radical, (B) no fractions left underneath the radical, and (C) no radicals left in the denominator All even powered variables are perfect squares— the square root is the ½ power.
Simplify, if possible
Simplify, if possible
Simplify, if possible
Simplify, if possible
Rationalizing the denominator Multiply by a sq. rt. that will give you a perfect sq. in the denominator so that you can eliminate the radical
Simplify, if possible
Simplifying Higher Order Radicals
Simplify
Examples
More Examples
Radical Operations +, -, X, / Radicals Treat Radicals like variables Must have like radicals to add or subtract Like radicals are the same radicand the same index
More Radical Operations When multiplying— remember “inside #s with inside #s and outside #s with outside #s” Multiply then simplify or simplify then multiply You must foil if you multiply a binomial by another binomial!!
Dividing Radicals When dividing, you can not have a radical left in the denominator in the final answer. If there is only 1 term, then we rationalize. If there are 2 terms, then multiply by the conjugate
Examples
Simplify completely
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