3z^2-5z+11 i have no clue

Question

3z^2-5z+11

Answer 1

3z^2 -5z +11 = 0

use the quadratic formula: x=(-b+/-sqr(b^2-4ac))/2a

where a=3, b=-5, c = 11

z = 5/6 +/-(1/6)sqr(25-132)

z = (5+/- sqr-107)/6

z = 5/6 + (1/6)isqr107 or 5/6 - (1/6)sqr107