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how do you simplify problems such as (1+sqrt(3)/3)/(1-sqrt(3)/3)

 Nov 26, 2016
 #1
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Simplify the following:
(1 + (sqrt(3))/(3))/(1 - (sqrt(3))/(3))

Put each term in 1 - (sqrt(3))/(3) over the common denominator 3: 1 - (sqrt(3))/(3) = 3/3 + (-sqrt(3))/(3):
(1 + (sqrt(3))/(3))/(3/3 + (-sqrt(3))/(3))

3/3 - (sqrt(3))/(3) = (3 - sqrt(3))/(3):
(1 + (sqrt(3))/(3))/((3 - sqrt(3))/(3))

Put each term in 1 + (sqrt(3))/(3) over the common denominator 3: 1 + (sqrt(3))/(3) = 3/3 + (sqrt(3))/(3):
(3/3 + (sqrt(3))/(3))/((3 - sqrt(3))/(3))

3/3 + (sqrt(3))/(3) = (3 + sqrt(3))/(3):
((3 + sqrt(3))/(3))/((3 - sqrt(3))/(3))

Multiply the numerator by the reciprocal of the denominator, (3 + sqrt(3))/(3 (3 - sqrt(3))/(3)) = (3 + sqrt(3))/(3)×3/(3 - sqrt(3)):
((3 + sqrt(3))×3)/(3 (3 - sqrt(3)))

((3 + sqrt(3))×3)/(3 (3 - sqrt(3))) = 3/3×(3 + sqrt(3))/(3 - sqrt(3)) = (3 + sqrt(3))/(3 - sqrt(3)):
(3 + sqrt(3))/(3 - sqrt(3))

Multiply numerator and denominator of (3 + sqrt(3))/(3 - sqrt(3)) by 3 + sqrt(3):
((3 + sqrt(3)) (3 + sqrt(3)))/((3 - sqrt(3)) (3 + sqrt(3)))

(3 - sqrt(3)) (3 + sqrt(3)) = 3×3 + 3 sqrt(3) - sqrt(3)×3 - sqrt(3) sqrt(3) = 9 + 3 sqrt(3) - 3 sqrt(3) - 3 = 6:
((3 + sqrt(3)) (3 + sqrt(3)))/(6)

Combine powers. ((3 + sqrt(3)) (3 + sqrt(3)))/(6) = ((3 + sqrt(3))^(1 + 1))/(6):
((3 + sqrt(3))^1 + 1)/(6)

1 + 1 = 2:
((3 + sqrt(3))^2)/(6)

(3 + sqrt(3))^2 = 9 + 3 sqrt(3) + 3 sqrt(3) + 3 = 12 + 6 sqrt(3):
(12 + 6 sqrt(3))/(6)

Factor 6 out of 12 + 6 sqrt(3) giving 6 (2 + sqrt(3)):
(6 (2 + sqrt(3)))/(6)

(6 (2 + sqrt(3)))/(6) = 6/6×(2 + sqrt(3)) = 2 + sqrt(3):
Answer: |2 + sqrt(3)

 Nov 26, 2016
 #2
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"how do you simplify problems such as (1+sqrt(3)/3)/(1-sqrt(3)/3)"

 

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 Nov 26, 2016

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