Select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -9x2 + 2x + 4.
9 x^2 - 2 x - 4 = 0
x= [ 2 +/- sqrt (4 + 144 ) ] / 18
x = [ 2 +/- 12.2 ] /18
it says approximate so I will say 12.2 = 12
x = 14/18 or -10/18
or
x = .8 or -.6