Find the value of the discriminant. then describe the number and type of roots for the equation.
-3x^2-18x+2=0
a. the discriminant is -348. because the discriminant is less than 0 the two roots are complex
b. the discriminant is 348. because the discriminant is greater than 0 and is not a perfect square the roots are real and irrational
c. the discriminant is -300 because the discriminant is less than 0 the two roots are complex
d. the discriminant is 324 because the discriminant is greater than 0 and is a perfect square the two roots are real and rational