Practice
Solve for x.a) 7x2 −x−2 = 0
{0.6107,-0.4678}
{0.6107,-0.4678}
b) -9x2 +4x+1 = 0
{-0.1784,0.6228}
{-0.1784,0.6228}
c) -7x2 −8x+8 = 0
{-1.7836,0.6408}
{-1.7836,0.6408}
d) 6x2 +8x−2 = 0
{0.2153,-1.5486}
{0.2153,-1.5486}
e) -4x2 +4x+7 = 0
{-0.9142,1.9142}
{-0.9142,1.9142}
f) 1x2 −5x+1 = 0
{4.7913,0.2087}
{4.7913,0.2087}
g) -7x2 +6x+1 = 0
{-0.1429,1}
{-0.1429,1}
h) 7x2 +2x−9 = 0
{1,-1.2857}
{1,-1.2857}
i) 4x2 −5x−4 = 0
{1.8042,-0.5542}
{1.8042,-0.5542}
j) 1x2 +4x−5 = 0
{1,-5}
{1,-5}