Question

condition for equal roots

Answer 1

Answer:

b^2-4ac=0

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Answer 2

Step-by-step explanation:

Step-by-step explanation:It has equal root when − a 2 + a + 2 = 0 . Hint: A quadratic equation has equal roots iff its discriminant is zero. A quadratic equation has equal roots iff these roots are both equal to the root of the derivative. Discriminant must be 0 in the case when two equal real roots in a quadratic equations.