The rationalising factor for the denominator of the expression 3 - sqrt(5) is (A)3- sqrt 5 (B) 3 + sqrt(5) (C) 1/(3 + sqrt(5)) (D) 1/(3 - sqrt(5))
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Answer:
3 + sqrt(5)
Step-by-step explanation:
it is just the conjugate
only the sign changes
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