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Rationalize Denominators (Optional)
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Grade Level
Algebra I
ALG1.101 Rationalize Denominators (Optional)
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For positive numbers a and b with a != b, which identity rationalizes 1/(sqrt(a) + sqrt(b))?
A
1/(sqrt(a) + sqrt(b)) = (sqrt(a) + sqrt(b))/(a + b)
B
1/(sqrt(a) + sqrt(b)) = (sqrt(a) - sqrt(b))/(a - b)
C
1/(sqrt(a) + sqrt(b)) = (a - b)/(sqrt(a) - sqrt(b))
D
1/(sqrt(a) + sqrt(b)) = 1/(a + b)
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