Practice
Solve for x.a) -8x2 +6x+7 = 0
{-0.6328,1.3828}
{-0.6328,1.3828}
b) -1x2 +x+2 = 0
{-1,2}
{-1,2}
c) -2x2 −6x−3 = 0
{-2.366,-0.634}
{-2.366,-0.634}
d) 1x2 −3x−4 = 0
{4,-1}
{4,-1}
e) -5x2 −x+2 = 0
{-0.7403,0.5403}
{-0.7403,0.5403}
f) -9x2 +8x−1 = 0
{0.1505,0.7384}
{0.1505,0.7384}
g) 3x2 −4x−8 = 0
{2.4305,-1.0972}
{2.4305,-1.0972}
h) -3x2 −2x+7 = 0
{-1.8968,1.2301}
{-1.8968,1.2301}
i) 1x2 +2x−5 = 0
{1.4495,-3.4495}
{1.4495,-3.4495}
j) -1x2 −8x+6 = 0
{-8.6904,0.6904}
{-8.6904,0.6904}