Question

Two equal real roots, if b2 -4ac=________.​

Answer 1

Answer:

Say x2 = -1 is a quadratic equation. There is no real number whose square is negative. Therefore for this equation, there are no real number solutions. Hence, the expression (b2 – 4ac) is called the discriminant of the quadratic equation ax2 + bx + c = 0.

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Answer 2

Answer:

If b²-4ac = 0 then the two roots are equal.

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