Quadratic Equation

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1. The Sum of the roots of x²-x+1=0 is

-1 None of the above 1 2

2. For ax² + bx + c = 0, which of the following statement is wrong?

If b² – 4ac is negative, no real roots exist. If b² = 4ac , the roots are real and unequal. If b² – 4ac is a perfect square, the roots are rational If b² = 4ac , the roots are real and equal.

3. The roots of the equation 9x² – bx + 81 = 0 will be equal, if the value of b is

(a) ± 9 (d) ± 54 (c) ± 27 (b) ± 18

Information: Quadratic Equation