Find the value of the discriminant of quadratic ` equation `sqrt(5)x^(2)-x-sqrt(5)=0
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-/5x²-x- -/5=0
here, a= -/5,b=-1,c= - -/5
discriminant,D=b²-4ac
D=(-1)²-4(-/5)(- -/5)
=1+20=21.
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