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Question
`11-x=2x^2`
Solution
`⇒2x^2+x-1=0`
Here,
`a=2,`
`b=1`
`c=-1`
Discriminant D is given by:
`D=b^2-4ac`
=`1^2-4xx2(-1)`
=`1+8`
=`9`
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