Practice
Solve for x.a) -6x2 +7x+9 = 0
{-0.7732,1.9399}
{-0.7732,1.9399}
b) 7x2 −7x−7 = 0
{1.618,-0.618}
{1.618,-0.618}
c) 6x2 −9x−5 = 0
{1.9315,-0.4315}
{1.9315,-0.4315}
d) -6x2 −5x+7 = 0
{-1.5744,0.741}
{-1.5744,0.741}
e) 5x2 −6x−7 = 0
{1.9266,-0.7266}
{1.9266,-0.7266}
f) -6x2 +9x−3 = 0
{0.5,1}
{0.5,1}
g) -1x2 −9x−1 = 0
{-8.8875,-0.1125}
{-8.8875,-0.1125}
h) -3x2 −5x+7 = 0
{-2.5734,0.9067}
{-2.5734,0.9067}
i) -7x2 −2x+4 = 0
{-0.9122,0.6265}
{-0.9122,0.6265}
j) 5x2 −6x−9 = 0
{2.0697,-0.8697}
{2.0697,-0.8697}