document.write( "Question 243853: cube root of 27w to the 12th power over 100\r
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document.write( "Explanation:\r
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document.write( "I am a volunteer math tutor. My student disagrees with the answer I came up with, so I am writing to you for any help in justifying her answer or my answer as \"more correct\". Here's the problem: Show your work in solving this cube root problem.\r
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document.write( "The heart of the question is my student's answer vs. my answer. Which one is more correct?\r
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document.write( "Student:\r
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document.write( "cube( (3 x 3 x 3) w^(4 x 3)/(75 + 25) )
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document.write( " 3w4/(5 x 5 x 5) + cube( 25 )
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document.write( " 3w4/5 + cube ( 25 ) <<< student's answer\r
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document.write( "Tutor:\r
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document.write( "cube( (3 x 3 x 3) w^(4 x 3)/(75 + 17 + 8) )
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document.write( " 3w4/(5 x 5 x 5) + cube( 17 ) + (2 x 2 x 2)
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document.write( " 3w4/5 + cube ( 17 ) + 2
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document.write( " 3w4/7 + cube (17) <<< tutor's answer\r
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document.write( "Which answer will the teacher of my student consider as \"correct\" ?\r
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document.write( " 3w4/5 + cube ( 25 ) OR 3w4/7 + cube (17)\r
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document.write( "Thank you. Rob Miller \n" );
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Algebra.Com's Answer #178587 by scott8148(6628) You can put this solution on YOUR website! breaking the denominator into sums is NOT a good technique for simplifying this\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "my two cents:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiplying the fraction by 10/10 ___ cbrt[(10 * 27w^12) / 1000]\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "extracting WHOLE roots ___ (3w^4 / 10)cbrt(10)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this leaves no roots in the denominator \n" ); document.write( " |