20) If the value of discrimant is zero for a quadratic equation then each root of the equation is..
21) The difference

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20) If the value of discrimant is zero for a quadratic equation then each root of the equation is..
21) The difference of the roots of the quadratic equation ax? + bx + c = 0 is 4 then b’- 4ac ….​

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Iris

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