Which statement about the following question is true? 2x^2-9x+2=-1

The discriminant of a quadratic equation helps determine the types of roots that can be extracted from the polynomial equation. The sign of the discriminant helps to do this. The formula is b^2 -4ac equal to (-9)^2 -4*2*3 equal to 57. this is over zero and there are two roots, hence.

Step-by-step explanation:

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4

you can use a^2+ b^2=c^2