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यदि `a+b-5` और `a-b-3`, हो तो `(a^(2)+b^(2))` का मान बताइए?A. 17B. 18C. 19D. 20 |
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Answer» Correct Answer - A `a+b=5` `a^(2)+b^(2)+2ab=25` …………..i `a-b=3` `a^(2)+b^(2)-2ab=9`………….ii From equation i and ii `2(a^(2)+b^(2))=34` `a^(2)+b^(2)=17` |
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