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`(13+2sqrt(5))^(2)=?sqrt(5)+189`A. 26B. 25C. 52D. 130 |
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Answer» Correct Answer - C `(13+2sqrt(5))^(2)=?xxsqrt(5)+189` `rArr 169+20+2xx13xx2sqrt(5)=?xxsqrt(5)+189` `189+52xxsqrt(5)=?xxsqrt(5)+189` `rArr ?=52` |
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