Practice
Solve for x.a) -5x2 −7x+7 = 0
{-2.0748,0.6748}
{-2.0748,0.6748}
b) 2x2 +2x−6 = 0
{1.3028,-2.3028}
{1.3028,-2.3028}
c) -8x2 −6x−1 = 0
{-0.5,-0.25}
{-0.5,-0.25}
d) 5x2 −9x−2 = 0
{2,-0.2}
{2,-0.2}
e) -2x2 −x+4 = 0
{-1.6861,1.1861}
{-1.6861,1.1861}
f) -1x2 −2x+1 = 0
{-2.4142,0.4142}
{-2.4142,0.4142}
g) 1x2 +9x+3 = 0
{-0.3467,-8.6533}
{-0.3467,-8.6533}
h) -8x2 +2x+2 = 0
{-0.3904,0.6404}
{-0.3904,0.6404}
i) 7x2 +3x−3 = 0
{0.4745,-0.9031}
{0.4745,-0.9031}
j) -9x2 −5x+6 = 0
{-1.1402,0.5847}
{-1.1402,0.5847}