grade 11 student

can you show me how to do this square root of 21/168


First you should simplify the fraction 21/168 to get

21/168 = 1/8. 8 is 2x2x2 = 4x2 so the square root of 8 is 2 times the square root of 2. Hence Some teachers don't like to see a root in the denominator of a fraction. If this is true for your teacher then multiply the numerator and denominator by the square root of 2. This gives

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