Can any of you guys me match these? i'm so bad at it and i need it in one period.

In a quadratic equation of the form (ax^2 + bx + c), the discriminant is equal to (b^2 - 4ac).

So for the first question it would be
4^2 - 4*(6*-2) = 64
Second question (-7)^2 - 4*(9*5) = -131

You can do the rest.