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What will be the nature of the roots of the quadratic equation x^2 + 10x + 25?(a) Imaginary(b) Real(c) Irrational(d) EqualI got this question in a job interview.Question is from Quadratic Equation in chapter Quadratic Equation of Mathematics – Class 10

Answer» RIGHT CHOICE is (d) Equal

Best explanation: To check the nature of the ROOTS, the discriminant must be either equal to zero, LESS than zero or greater than zero.

Discriminant = b^2 – 4ac = 10^2 – 4 × 25 × 1 = 100 – 100 = 0

Since discriminant is equal to zero, the roots of the equation are equal.


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