Q. Which statement best explains why there is no real solution to the quadratic equation            2x2+x+7=0 ? 

1. The value of 1^2-4.2.7 i i is negative.
2. The value of 1^2-4.2.7 i i is equal to 0.
3. The value of 1^2-4.2.7 i i is positive.
4. The value of 1^2-4.2.7 i i is not a perfect square.