Practice
Solve for x.a) -9x2 +9x+8 = 0
{-0.5672,1.5672}
{-0.5672,1.5672}
b) -2x2 +7x+6 = 0
{-0.7122,4.2122}
{-0.7122,4.2122}
c) -4x2 −8x+1 = 0
{-2.118,0.118}
{-2.118,0.118}
d) -6x2 +3x+6 = 0
{-0.7808,1.2808}
{-0.7808,1.2808}
e) 6x2 +5x−9 = 0
{0.877,-1.7103}
{0.877,-1.7103}
f) -1x2 +x+2 = 0
{-1,2}
{-1,2}
g) 3x2 +5x−1 = 0
{0.1805,-1.8471}
{0.1805,-1.8471}
h) 3x2 +9x−7 = 0
{0.6409,-3.6409}
{0.6409,-3.6409}
i) -5x2 −2x+6 = 0
{-1.3136,0.9136}
{-1.3136,0.9136}
j) 8x2 −3x−6 = 0
{1.0736,-0.6986}
{1.0736,-0.6986}