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CBSE Class 10 Answered

x squared plus 2 x minus 5 equals 0
Asked by 263970164430568 | 04 Aug, 2018, 10:54: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight x squared space plus space 2 straight x space minus space 5 space equals 0 straight a space equals space 1 comma space straight b space equals space 2 space and space straight c space equals space minus 5 straight x space equals space minus straight b space plus-or-minus space fraction numerator square root of straight b squared space minus space 4 ac end root over denominator 2 straight a end fraction space space equals negative 2 space plus-or-minus space fraction numerator square root of left parenthesis 2 right parenthesis squared space minus space 4 space cross times space 1 space cross times negative 5 end root over denominator 2 space cross times space 1 end fraction space space space equals negative 2 space plus-or-minus space fraction numerator square root of 24 over denominator 2 end fraction space space equals space fraction numerator 2 left parenthesis negative 1 space plus-or-minus space square root of 6 right parenthesis over denominator 2 end fraction equals space minus 1 space plus-or-minus space square root of 6 straight x space equals negative 1 space plus space square root of 6 space or space straight x space equals space minus 1 space minus space square root of 6 space end style
Answered by Yasmeen Khan | 06 Aug, 2018, 11:26: AM
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