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GUIDED NOTES – Lesson 4-1 Rational Exponents and Radical Expressions Name: ______________________ Period: ___ OBJECTIVE: I can simplify and convert radical expressions and rational exponents.5280025865505003082290881380001174115931545520128588900amn=nam00amn=namSometimes fractional exponents are used to represent power of numbers or variables. The numerator of the fraction (m) represents the power, the denominator (n) represents the root. The exponent in the denominator must always be positive.EXAMPLES A) B) C) 388620016194400PRACTICE: Write the expression in radical form:left127000PRACTICE: Write the expression in exponential form:3890645744000left762000 To simplify the square root of a number, create a factor tree and any two identical numbers may come out of the radical. Buddy system! If there is no buddy, it must stay under the radical.18 32To simplify a cube root use the same process as a square root, except _________ of the same numbers are needed to come out.26273301768400482810042500354The same is true for any other power outside the radical.46254x11564EXAMPLES: Evaluate each exponential. b. c. d. e. If the radical contains variables:Divide power of variable by the root. The quotient is the new power of the variable outside the radicalIf there is a remainder, that is the power of the variable still under the radical.34385253619500190500463560019457416065500349639113335003561715889000171450889000EXAMPLES: Write all radicals as exponentials, and then apply the rules for rational exponents. Leave answers in exponential form.45624751206500a) b) EXAMPLES: Simplify – Write your answer in simplest root and exponential form.a) x3y7z812b) 8x5132x53c) -125x4x23 ................
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