x^2-1/2x-1/2=0 find the nature of the roots of the following quadratic equation
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☆ Given quadratic equation:-
- x²-1/2x-1/2 = 0.
☆ To find:-
- Nature of the roots.
☆ Now,
=》 x²-1/2x-1/2 = 0
=》 2x²-x-1/2 = 0
{By Taking LCM}
=》 2x²-x-1 = 0×2.
☆ So,
Discriminant (d)
☆ Also,
We know that
- If d=0 then roots are real and equal.
- If d<0 Then real roots does not exist.
- If d>0 Then roots are real and distinct.
☆ Therefore,
In this case,
=》 d = (-1)²-4(2)(-1).
=》 d = 1-(-8)
=》 d = 1+8
So d>0 therefore the given quadratic equation have real (non-negative) and distinct roots in nature.
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