What are the zeros of the quadratic function f(x) = 2x2 + 16x – 9?

x = –4 – StartRoot StartFraction 7 Over 2 EndFraction EndRoot and x = –4 + StartRoot StartFraction 7 Over 2 EndFraction EndRoot
x = –4 – StartRoot StartFraction 25 Over 2 EndFraction EndRoot and x = –4 + StartRoot StartFraction 25 Over 2 EndFraction EndRoot
x = –4 – StartRoot StartFraction 21 Over 2 EndFraction EndRoot and x = –4 + StartRoot StartFraction 21 Over 2 EndFraction EndRoot
x = –4 – StartRoot StartFraction 41 Over 2 EndFraction EndRoot and x = –4 + StartRoot StartFraction 41 Over 2 EndFraction EndRoot