condition for equal roots
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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.