Practice
Solve for x.a) 5x2 +8x−1 = 0
{0.1165,-1.7165}
{0.1165,-1.7165}
b) -9x2 −8x+3 = 0
{-1.173,0.2842}
{-1.173,0.2842}
c) 4x2 −4x−9 = 0
{2.0811,-1.0811}
{2.0811,-1.0811}
d) -7x2 +2x+2 = 0
{-0.4104,0.6961}
{-0.4104,0.6961}
e) 3x2 −3x−7 = 0
{2.1073,-1.1073}
{2.1073,-1.1073}
f) -6x2 +3x+7 = 0
{-0.8587,1.3587}
{-0.8587,1.3587}
g) 5x2 −x−2 = 0
{0.7403,-0.5403}
{0.7403,-0.5403}
h) -7x2 −7x+7 = 0
{-1.618,0.618}
{-1.618,0.618}
i) 1x2 +2x−6 = 0
{1.6458,-3.6458}
{1.6458,-3.6458}
j) -1x2 +x+8 = 0
{-2.3723,3.3723}
{-2.3723,3.3723}