(√3-√5)(√5+√3)/7-2√5

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1 Answer

(√3-√5)(√5+√3)/(7-2√5)=(3-5)/(7-2√5)=

-2/(7-2√5)=-2(7+2√5)/((7-2√5)(7+2√5)=

-2(7+2√5)/(49-20)=-2(7+2√5)/29=

-14/29-4√5/29=-0.7912 approx.

The question could be interpreted differently: ((√3-√5)(√5+√3)/7)-2√5.

The solution is -2/7-2/√5=-2/7-2√5/5=-2(5+7√5)/35=-1.1801 approx.

by Top Rated User (1.1m points)

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