SIMPLIFYING RADICAL EXPRESSIONS

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Simplify Radical Expressions
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Presentation transcript:

SIMPLIFYING RADICAL EXPRESSIONS A RADICAL EXPRESSION is an expression that contains a square root. Examples: or The RADICAND is the expression under the radical sign. For , the radicand is 5ab3

SIMPLIFYING RADICAL EXPRESSIONS A radical expression is in SIMPLEST FORM if it contains no perfect square factors other than 1. Examples: is in simplest form. is NOT in simplest form. Why?

FLASH CARDS Simplified or Not? YES! J

FLASH CARDS Simplified or Not? NO! 4 is a factor! L

FLASH CARDS Simplified or Not? NO! x2 is a factor! L

FLASH CARDS Simplified or Not? NO! 9x2 is a factor! L

FLASH CARDS Simplified or Not? YES! J

SIMPLIFYING RADICAL EXPRESSIONS PRODUCT PROPERTY OF SQUARE ROOTS

SIMPLIFYING RADICAL EXPRESSIONS SIMPLIFYING RADICALS

SIMPLIFYING RADICAL EXPRESSIONS SIMPLIFYING RADICALS NOTICE THAT ONLY THE POSITIVE SQUARE ROOT IS USED.

FLASH CARDS Simplify J

FLASH CARDS Simplify J

FLASH CARDS Simplify J

FLASH CARDS Simplify J

FLASH CARDS Simplify J

FLASH CARDS Simplify J

SIMPLIFYING RADICAL EXPRESSIONS are examples of irrational numbers. Simplified expressions can not have irrational numbers (square roots) in their denominators. RATIONALIZING THE DENOMINATOR is a method used to eliminate radicals from the denominator of a fraction.

SIMPLIFYING RADICAL EXPRESSIONS Step 1: Multiply numerator & denominator by the radical in the denominator. Step 2: Simplify, Reduce

SIMPLIFYING RADICAL EXPRESSIONS Step 1: Multiply numerator & denominator by the radical in the denominator.

SIMPLIFYING RADICAL EXPRESSIONS Can we just divide? Simplify: YES! Step 1: Multiply numerator & denominator by the radical in the denominator. Step 2: Simplify, Reduce

SIMPLIFYING RADICAL EXPRESSIONS If the denominator is a binomial with a radical, i.e. Then multiply the numerator and denominator by the CONJUGATE of the denominator. The conjugate of is The conjugate of is

SIMPLIFYING RADICAL EXPRESSIONS Step 1: Multiply numerator & denominator by the conjugate of the denominator. Step 2: Simplify, Reduce

SIMPLIFYING RADICAL EXPRESSIONS Try this one: Step 1: Multiply numerator & denominator by the conjugate of the denominator. Step 2: Simplify, Reduce

SIMPLIFYING RADICAL EXPRESSIONS Try this one: Step 1: Multiply numerator & denominator by the conjugate of the denominator. Step 2: Simplify, Reduce

SIMPLIFYING RADICAL EXPRESSIONS Try this one: