Practice
Solve for x.a) 4x2 +8x−6 = 0
{0.5811,-2.5811}
{0.5811,-2.5811}
b) -9x2 −5x+4 = 0
{-1,0.4444}
{-1,0.4444}
c) -8x2 −x+5 = 0
{-0.8555,0.7305}
{-0.8555,0.7305}
d) 7x2 −9x−3 = 0
{1.5604,-0.2747}
{1.5604,-0.2747}
e) 4x2 −5x+1 = 0
{1,0.25}
{1,0.25}
f) -9x2 −x+2 = 0
{-0.5302,0.4191}
{-0.5302,0.4191}
g) 7x2 +6x+1 = 0
{-0.2265,-0.6306}
{-0.2265,-0.6306}
h) 7x2 +4x−6 = 0
{0.6832,-1.2546}
{0.6832,-1.2546}
i) 4x2 +6x+1 = 0
{-0.191,-1.309}
{-0.191,-1.309}
j) -3x2 −8x−1 = 0
{-2.5352,-0.1315}
{-2.5352,-0.1315}