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RADICAL EXPRESSIONS. RADICAL EXPRESSIONS. ARE THE SAME AS SQUARE ROOTS. Radical Expressions. Square Roots & Perfect Squares Simplifying Radicals Multiplying Radicals Dividing Radicals Adding Radicals. What is the square root?. 64.
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RADICAL EXPRESSIONS ARE THE SAME AS SQUARE ROOTS
Radical Expressions • Square Roots & Perfect Squares • Simplifying Radicals • Multiplying Radicals • Dividing Radicals • Adding Radicals
The square root of a number is a # when multiplied by itself equals the number 64 8 8
A Square Root is a term when squared is the Perfect Square X2 X X
Answer 64x2 8x 8x
Answer 4x2 2x 2x
What is the square root? (x+3)2
Answer (x+3) (x+3)2 (x+3)
Radical Sign • This is the symbol for square root • If the number 3 is on top of the v, it is called the 3rd root.
Radical Sign • This is the 4th root. • This is the 6th root • If n is on top of the v, it is called the nth root.
Cube Root If the sides of a cube are 3 inches Then the volume of the cube is 3 times 3 times 3 or 33 which is 27 cubic inches.
NUMBER Perfect Squares Numbers that are perfect squares are: 12=1, 22= 4, 32= 9, 42= 16, 52= 25, 62= 36, 72= 49, 82= 64, 92= 81, 102= 100, …
Recognizing Perfect Squares(NAME THE SQUARE ROOTS) Variables that are perfect squares are: x2, a4, y22, x100… (Any even powered variable is a perfect square) x25 EVEN POWERED EXPONENTS ARE SQUARES x25 x50
NAME THE SQUARE ROOT 9x50
3x25 EVEN POWERED EXPONENTS ARE SQUARES 3x25 9x50
Recognizing Perfect Squares(NAME THE SQUARE ROOTS) x2 4 25x2 4x6
Recognizing Perfect Squares(NAME THE SQUARE ROOTS) x 2 x x2 2 4 5x 2x3 5x 25x2 2x3 4x6
Simplifying Square Roots We can simplify if 8 contains a Perfect Square
Simplifying Square Roots Look to factor perfect squares (4, 9, 16, 25, 36…) Put perfect squares in first radical and the other factor in 2nd. Take square root of first radical
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) (Put perfect squares in first radical and other factor in 2nd)
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, 36…) (& Put perfect squares in first radical and other factor in 2nd)
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, 36…) (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical
Simplifying Square Roots 1. Factor any perfect squares (4, 9, 16, 25, 36…) (& Put perfect squares in first radical and other factor in 2nd)
Simplifying Radicals 1. Factor any perfect squares (4, 9, 16, 25, 36…) (& Put perfect squares in first radical and other factor in 2nd)
Simplifying Radicals 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical
Simplifying Fraction Radicals 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) from NUMERATOR & DENOM. (& Put perfect squares in first radical and other factor in 2nd)
Simplifying Fraction Radicals 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) from NUMERATOR & DENOM. (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical
Simplifying Fraction Radicals 1. Factor any perfect squares (4, 9, 16, 25, x2, y6…) from NUMERATOR & DENOM. (& Put perfect squares in first radical and other factor in 2nd) 2. Take square root of first radical 3. REDUCE
Finding Perfect Squares The most common perfect squares are 4 & 9. USE DIVISIBILITY RULES: A number is divisible by 4 if the last 2 digits are divisible by 4. ( 23,732 is divisible by 4 since 32 is.) A number is divisible by 9 if the sum of it’s digits are. (4653 is divisible by 9 since the sum of it’s digits are.)
Finding Perfect Squares MORE EASY TO FIND PERFECT SQUARES: A number with an even number of Zeros. ( 31,300 is divisible by 10, 70,000 is divisible by 100) A number ending in 25, 50 or 75 is divisible by 25. (425 & 350 & 775 are all divisible by 25)
Perfect Squares Guide Divisibility Rules for Perfect Squares 4: If Last 2 Digits are Divisible by 4 9: If Sum of Digits are Divisible by 9 16: Use 4 Rule 25: If # ends in 25, 50, 75 or 00 36: Use 4 or 9 Rule 49: Look for multiple of 50 and subtract multiple 64: Use 4 Rule 81: Use 9 Rule 100: If # ends in 00 121: No Rule, Divide # by 121 144: Use 4 or 9 Rule
Multiply Radicals Multiply to one radical
Multiply Radicals Multiply to one radical
Multiply Radicals Multiply to one radical Simplify • Factor any perfect squares (4, 9, 16, x2, y6…)
Multiply Radicals Multiply to one radical Simplify • Factor any perfect squares (4, 9, 16, x2, y6…)
Multiply Radicals Multiply to one radical Simplify • Factor any perfect squares (4, 9, 16, x2, y6…) • Take square root of first radical