Practice
Solve for x.a) 9x2 −8x−9 = 0
{1.5388,-0.6499}
{1.5388,-0.6499}
b) 4x2 −6x−7 = 0
{2.2707,-0.7707}
{2.2707,-0.7707}
c) -2x2 −3x+2 = 0
{-2,0.5}
{-2,0.5}
d) -2x2 −9x−9 = 0
{-3,-1.5}
{-3,-1.5}
e) -1x2 −7x−3 = 0
{-6.5414,-0.4586}
{-6.5414,-0.4586}
f) 8x2 +3x−7 = 0
{0.7665,-1.1415}
{0.7665,-1.1415}
g) -4x2 +6x+7 = 0
{-0.7707,2.2707}
{-0.7707,2.2707}
h) -4x2 −8x−3 = 0
{-1.5,-0.5}
{-1.5,-0.5}
i) -1x2 −2x+5 = 0
{-3.4495,1.4495}
{-3.4495,1.4495}
j) -7x2 −8x+1 = 0
{-1.2565,0.1137}
{-1.2565,0.1137}