Question

If the roots of a quadratic equation are real,irrational,and unequal,the discriminant could have a value of

1)1
2)0
3)8
4)-6
Help me out guys.

Answer 1

3) 8

Explanation:

Real and unequal:

B² - 4AC > 0

Irrational: B²-4AC not a perfect square

Answer 2

8

Explanation:

The condition for the discriminant b² - 4ac is

If b² - 4ac > 0 then roots are real, irrational and unequal

If b² - 4ac > 0 and a perfect square, roots are real, rational and unequal.

Thus

b² - 4ac = 8