Practice
Solve for x.a) 9x2 −2x−8 = 0
{1.0604,-0.8382}
{1.0604,-0.8382}
b) -6x2 −6x+5 = 0
{-1.5408,0.5408}
{-1.5408,0.5408}
c) -7x2 −4x+8 = 0
{-1.3923,0.8209}
{-1.3923,0.8209}
d) -2x2 +5x+4 = 0
{-0.6375,3.1375}
{-0.6375,3.1375}
e) 9x2 +8x−5 = 0
{0.4234,-1.3122}
{0.4234,-1.3122}
f) 5x2 −4x−1 = 0
{1,-0.2}
{1,-0.2}
g) 7x2 −x−4 = 0
{0.8307,-0.6879}
{0.8307,-0.6879}
h) 1x2 −5x−7 = 0
{6.1401,-1.1401}
{6.1401,-1.1401}
i) -1x2 −9x+1 = 0
{-9.1098,0.1098}
{-9.1098,0.1098}
j) -6x2 −x+3 = 0
{-0.7953,0.6287}
{-0.7953,0.6287}