document.write( "Question 303313: Please Help, I am confused about how to work with third roots.\r
\n" ); document.write( "\n" ); document.write( "I am supposed to multiply then simplify by factoring.
\n" ); document.write( "(3rd root)of y^7 * (3rd root) of 16y^8\r
\n" ); document.write( "\n" ); document.write( "Use Rational exponents to simplify the third root of x^6\r
\n" ); document.write( "\n" ); document.write( "Find the 16th root of (-8)^16\r
\n" ); document.write( "\n" ); document.write( "Rewrite the 4th root of 23 with a rational exponent. \r
\n" ); document.write( "\n" ); document.write( "Simplify the 3rd root of -1/64\r
\n" ); document.write( "\n" ); document.write( "Simplify by taking roots of the numerator and denominator
\n" ); document.write( "(3rd root) of 1000x^14/y^3\r
\n" ); document.write( "\n" ); document.write( "Solve
\n" ); document.write( "The square root of 5x+29 = x+3\r
\n" ); document.write( "\n" ); document.write( "I am completely lost when working with roots. Any help would be greatly appreciated!
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Algebra.Com's Answer #217510 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
multiply then simplify by factoring.
\n" ); document.write( "Use this as a cube root \"3sqrt%28n%29\" symbol
\n" ); document.write( ":
\n" ); document.write( "(3rd root)of y^7 * (3rd root) of 16y^8
\n" ); document.write( "\"3sqrt%28y%5E7%29+%2A+3sqrt%2816y%5E8%29\"
\n" ); document.write( ":
\n" ); document.write( "We can combine these under single radical
\n" ); document.write( "\"3sqrt%2816y%5E8y%5E7%29\"
\n" ); document.write( ":
\n" ); document.write( "Add exponents when you multiply
\n" ); document.write( "\"3sqrt%2816y%5E15%29\"
\n" ); document.write( ":
\n" ); document.write( "Factor to reveal perfect cubes
\n" ); document.write( "\"3sqrt%288%2A2%2Ay%5E3%2Ay%5E3%2Ay%5E3%2Ay%5E3%2Ay%5E3%29\"
\n" ); document.write( ":
\n" ); document.write( "Extract those perfect cubes
\n" ); document.write( "\"2%2Ay%5E5%2A3sqrt%282%29\"
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\n" ); document.write( ":
\n" ); document.write( "Use Rational exponents to simplify the third root of x^6
\n" ); document.write( "to raise on power to another power, multiply exponents
\n" ); document.write( "\"%28x%5E6%29%5E%281%2F3%29\" = \"x%5E%286%2A%281%2F3%29%29\" = \"x%5E2\"
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\n" ); document.write( ":
\n" ); document.write( "Find the 16th root of (-8)^16
\n" ); document.write( "\"%28%28-8%29%5E16%29%5E%281%2F16%29\" = \"%28-8%29%5E%2816%2A%281%2F16%29%29\" = \"%28-8%29%5E1\" = -8
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\n" ); document.write( ":
\n" ); document.write( "Rewrite the 4th root of 23 with a rational exponent.
\n" ); document.write( "\"23%5E%281%2F4%29\"
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Simplify the 3rd root of -1/64
\n" ); document.write( "\"3sqrt%28-1%2F64%29\" = \"3sqrt%28%28-1%2F4%29%2A%28-1%2F4%29%2A%28-1%2F4%29%29\" = \"%28-1%2F4%29\"
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\n" ); document.write( ":
\n" ); document.write( "Simplify by taking roots of the numerator and denominator
\n" ); document.write( "(3rd root) of 1000x^14/y^3
\n" ); document.write( "\"3sqrt%281000x%5E14%2Fy%5E3%29\"
\n" ); document.write( "Extract cube root 1/y^3
\n" ); document.write( "\"%281%2Fy%29%2A3sqrt%281000x%5E14%29\"
\n" ); document.write( "Extract the cube root of 1000
\n" ); document.write( "\"%2810%2Fy%29%2A3sqrt%28x%5E14%29\"
\n" ); document.write( "Factor inside the radical
\n" ); document.write( "\"%2810%2Fy%29%2A3sqrt%28x%5E3%2Ax%5E3%2Ax%5E3%2Ax%5E3%2Ax%5E2%29\"
\n" ); document.write( "Extract
\n" ); document.write( "\"%2810%2Fy%29%2Ax%5E4%2A3sqrt%28x%5E2%29\"
\n" ); document.write( ":
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\n" ); document.write( "Solve
\n" ); document.write( "The square root of 5x+29 = x+3
\n" ); document.write( "\"sqrt%285x%2B29%29+=+x%2B3\"
\n" ); document.write( "square both sides:
\n" ); document.write( "5x + 29 = (x+3)^2
\n" ); document.write( "FOIL the right side
\n" ); document.write( "5x + 29 = x^2 + 6x + 9
\n" ); document.write( "combine like terms on the right
\n" ); document.write( "0 = x^2 + 6x - 5x + 9 - 29
\n" ); document.write( "A quadratic equation
\n" ); document.write( "x^2 + x - 20 = 0
\n" ); document.write( "Factors to
\n" ); document.write( "(x+5)(x-4) = 0
\n" ); document.write( "two solutions
\n" ); document.write( "x = -5
\n" ); document.write( "and
\n" ); document.write( "x = +4
\n" ); document.write( ":
\n" ); document.write( "Check both solution in original equation
\n" ); document.write( "x = -5
\n" ); document.write( "\"sqrt%285%29-5%29%2B29%29+=+-5%2B3\"
\n" ); document.write( "\"sqrt%28-25%2B29%29+=+-2\"
\n" ); document.write( "\"sqrt%284%29+=+-2\" not a solution
\n" ); document.write( "x = 4
\n" ); document.write( "\"sqrt%285%284%29%2B29%29+=+4%2B3\"
\n" ); document.write( "\"sqrt%2820%2B29%29+=+7\"
\n" ); document.write( "\"sqrt%2849%29+=+7\"; a good solution (x=4)
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