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To find the roots use the quadratic formula x = -b/2a +or- root of b2-4ac / 2a

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d=b^2-4ac

then,

x=[-b+(d^1/2)]/2 or x=[-b-(d^1/2)]/2

x=[-b+(b^2-4ac)^1/2]/2 or x=[-b-(b^2-4ac)^1/2]/2

hence,by substituting a,b,c values,we get the absolute values of 'x'.