Practice
Solve for x.a) -5x2 +7x−2 = 0
{0.4,1}
{0.4,1}
b) -2x2 +9x−1 = 0
{0.114,4.386}
{0.114,4.386}
c) -2x2 −9x−9 = 0
{-3,-1.5}
{-3,-1.5}
d) 8x2 −2x−8 = 0
{1.1328,-0.8828}
{1.1328,-0.8828}
e) -8x2 +5x+9 = 0
{-0.7932,1.4182}
{-0.7932,1.4182}
f) 6x2 +6x−3 = 0
{0.366,-1.366}
{0.366,-1.366}
g) 6x2 −5x−6 = 0
{1.5,-0.6667}
{1.5,-0.6667}
h) -2x2 −6x+9 = 0
{-4.0981,1.0981}
{-4.0981,1.0981}
i) 1x2 −6x+4 = 0
{5.2361,0.7639}
{5.2361,0.7639}
j) 4x2 −5x−4 = 0
{1.8042,-0.5542}
{1.8042,-0.5542}