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Laws of Exponents (Warm-Up)
(1) (2) (3)
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Homework Go over homework answers/problems
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Radicals
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Radicals Radicand Index COEFFICIENT
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Simplifying Radicals "Roots" (or "radicals") are the "opposite" operation of applying exponents; you can "undo" a power with a radical, and a radical can "undo" a power. For instance, if you square 2, you get 4, and if you "take the square root of 4", you get 2; if you square 3, you get 9, and if you "take the square root of 9", you get 3. So does anybody know what we call numbers like: 4, 9, 16, 25, 36, 49…..
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So what are the “Perfect Squares”?
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Steps to Simplifying Radicals (that are not perfect squares)
Simplifying Radicals that are square roots Create a factor tree Identify any factor that is a perfect square That perfect square “pair” will come outside the radical and be multiplied by the existing coefficient All other factors will remain inside the radical as part of the radicand
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Simplifying Radicals
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200 𝑣 7 𝑟 10 28𝑥 4
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What about if the Index Changes?
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Adding and Subtracting Radicals
Must have the same radicand and index Only add and subtract the number outside the radical
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Adding and Subtracting Radicals
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Adding and Subtracting Independent Practice
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More Practice Adding and Subtracting
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Multiplication of Radicals
Multiplying Radicals only need same index to multiply multiply numbers on the outside of the radical separately than numbers on the inside of the radical must simplify the final answer as far as possible
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Multiplication of Radicals
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Multiplication of Radicals
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Multiplication of Radicals
Multiplying Radicals only need same index to multiply multiply numbers on the outside of the radical separately than numbers on the inside of the radical must simplify the final answer as far as possible
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Warm-Up Problems & Homework
𝑥 7 𝑥 (2) (−3 𝑧 2 ) 2 (3) 28𝑥 −2 7𝑦 −3 (4) (−2 𝑟 −4 𝑠 2 ) −3 (5) Simplify 525 (6) Simplify 𝑥 5 𝑦 6
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Multiplication of Radicals
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What Happens When…. We Square a Radical Term?
We Square a Binomial with a Radical? We are asked to Multiply a Binomial with a Radical by another Binomial with a Radical?
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Multiplication of Radicals
( 4 𝑥 2 𝑦 −2𝑥 ) 2
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More Practice Multiplying Radicals
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Division of Radicals Dividing radicals
Cannot have a fraction under a radical Cannot have a radical in the denominator (called rationalizing the denominator) Multiply top and bottom by the bottom radical Simplify your answer
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Division of Radicals
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Division of Radicals Practice
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More Practice With Division of Radicals
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Worksheet Division of Radicals
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REVIEW PROBLEMS 1)
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REVIEW PROBLEMS 6) −6 5− 6
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SOLVING RADICAL EQUATIONS
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Solving Simple Radical Equations
So, if we try to solve… 𝑦 = 5 …… then what is y? And if 2𝑥 = 8 …. then what is x = ?
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