Mathematics
Discuss the nature of the roots of the following equation without actually solving it:
x2 + - 1 = 0
Quadratic Equations
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Answer
Comparing x2 + - 1 = 0 with ax2 + bx + c = 0 we get,
a = 1, b = and c = -1.
We know that,
Discriminant = D = b2 - 4ac = - 4 × 1 × -1
= (2 × 3) + 4 = 10 ; which is positive and is not a perfect square.
Since, b is irrational and discriminant is greater than zero.
Hence, the roots are irrational and unequal.
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