Rationalize the denominator of 1 upon 2 plus 5 cube

1.	Rationalize the denominator of 1 upon 2 plus 5 cube
Answer» 1upon 7 cube 1/2+√5*2-√5/2-√5=2-√5/(2)^2-(5)^2=2-√5/4-5=2-√5/-1=-2+√5

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