Question

91. If there is no real number solution to the quadratic equation, x^2+2x+C=0, what is a possible value of c?

1


-2


0


3

Answer 1

For no real solution, you must have b^2 - 4ac of the quadratic formula be less than 0.

a = 1; b = 2; c = C

b^2 - 4ac < 0

2^2 - 4(1)(C) < 0

4 - 4C < 0

-4C < -4

C > 1

The only choice greater than 1 is 3.

Answer: the 4th choice, 3