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CBSE Class 10 Answered

Please solve question no 2 with proper explanation 
Asked by adityaahuja099 | 11 Dec, 2017, 09:10: PM
answered-by-expert Expert Answer
begin mathsize 16px style 2 straight x squared plus 3 kx plus 8 equals 0
Here comma space straight a equals 2 comma space straight b equals 3 straight k space and space straight c equals 8
Since space roots space are space equal comma space straight D equals 0
rightwards double arrow straight b squared minus 4 ac equals 0
rightwards double arrow open parentheses 3 straight k close parentheses squared minus 4 left parenthesis 2 right parenthesis left parenthesis 8 right parenthesis equals 0
rightwards double arrow 9 straight k squared minus 64 equals 0
rightwards double arrow 9 straight k squared equals 64
rightwards double arrow straight k squared equals 64 over 9
rightwards double arrow straight k equals plus-or-minus 8 over 3 end style
Answered by Rashmi Khot | 12 Dec, 2017, 10:16: AM
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