Practice
Solve for x.a) 3x2 +7x+1 = 0
{-0.1529,-2.1805}
{-0.1529,-2.1805}
b) -7x2 −5x+6 = 0
{-1.3495,0.6352}
{-1.3495,0.6352}
c) 5x2 −6x−9 = 0
{2.0697,-0.8697}
{2.0697,-0.8697}
d) -9x2 −8x+5 = 0
{-1.3122,0.4234}
{-1.3122,0.4234}
e) 2x2 +8x+1 = 0
{-0.1292,-3.8708}
{-0.1292,-3.8708}
f) 5x2 +5x−7 = 0
{0.7845,-1.7845}
{0.7845,-1.7845}
g) 1x2 −6x+5 = 0
{5,1}
{5,1}
h) -6x2 −9x+9 = 0
{-2.1861,0.6861}
{-2.1861,0.6861}
i) 3x2 −2x−6 = 0
{1.7863,-1.1196}
{1.7863,-1.1196}
j) -5x2 −5x+5 = 0
{-1.618,0.618}
{-1.618,0.618}