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# A quadratic equation has exactly one real number solution. Which is the value of its discriminant? WILL MARK BRAINLIEST a.−1 b.0 c.1 d.2

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Answer: B: 0Explanation: For a quadratic equation to have one real root, the discriminant must always be 0. To understand this principle, we have to take a step back and understand what the quadratic formula means.In order to find what the roots are, we use the quadratic formula. Keep in mind the expression before that the discriminant:Notice of appearance before the discriminant. For a solution, it is necessary that in addition of minus sign to disappear, and the only way to do that is if the discriminant is equal to zero.