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[" 70.The simplified form of "],[(2)/(sqrt(7)+sqrt(5))+(7)/(sqrt(12)-sqrt(5))-(5)/(sqrt(12)-sqrt(7))" is - "],[[" (a) "5," (b) "2," (c) "1," (d) "0]]

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(sqrt(7)-sqrt(5))^3 - (sqrt(7)+sqrt(5))^3

Evaluate (sqrt(7)-sqrt(5))/ (sqrt(7)-sqrt(5))

(1)/(2sqrt(7)+sqrt(5))-(1)/(2sqrt(5)+sqrt(7)) simplify

(sqrt(3)-sqrt(5))(sqrt(3)+sqrt(5))/(sqrt(7)-2sqrt(5))

(7+sqrt(5))/(7-sqrt(5))-(7-sqrt(5))/(7+sqrt(5))=

Simplify (sqrt(7)-sqrt(5))/(sqrt(7)+sqrt(5))+sqrt(35)

(sqrt(7)+sqrt(5))/(sqrt(7)-sqrt(5) Is equal to

(7+3sqrt(5))/(3+sqrt(5))+(7-3sqrt(5))/(3-sqrt(5))

(1)/(sqrt(2)+sqrt(5)-sqrt(7))