Question

f

Answer 1

Find the discriminant first.
For ax^2 + bx + c, the discriminant is b^2 - 4ac

Answer 2

121? @ranga

Answer 3

Yes. If D is the discriminant then:

If D > 0, the quadratic equation will have two real roots
If D = 0, the quadratic equation will have two equal roots
If D < 0, the quadratic equation will have two complex roots

There are two additional things we can say about positive discriminant, that is, when D > 0:

If D is a perfect square, the quadratic equation will have two real, rational roots
If D is not a perfect square, the quadratic equation will have two real, irrational roots

In this case 121 is a perfect square and therefore you can conclude ....

Answer 4

Yes.