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CBSE Class 9 Answered

If a2 + 9/a2 =31, then what is the value of a - 3/a?
Asked by Vikas | 15 Mar, 2017, 03:24: PM
answered-by-expert Expert Answer

begin mathsize 16px style Given space straight a squared plus 9 over straight a squared equals 31 Adding space minus 6 space on space both space sides comma space we space get straight a squared minus 6 plus 9 over straight a squared equals 31 minus 6 rightwards double arrow open parentheses straight a minus 3 over straight a close parentheses squared equals 25 rightwards double arrow straight a minus 3 over straight a equals plus-or-minus 5 end style

Answered by | 15 Mar, 2017, 03:42: PM

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