Practice
Solve for x.a) -4x2 +5x+6 = 0
{-0.75,2}
{-0.75,2}
b) 8x2 +5x−4 = 0
{0.4606,-1.0856}
{0.4606,-1.0856}
c) 5x2 +3x−8 = 0
{1,-1.6}
{1,-1.6}
d) 4x2 −8x+4 = 0
{1,1}
{1,1}
e) -5x2 +7x−1 = 0
{0.1615,1.2385}
{0.1615,1.2385}
f) -9x2 −6x+5 = 0
{-1.1498,0.4832}
{-1.1498,0.4832}
g) -8x2 +9x+6 = 0
{-0.4702,1.5952}
{-0.4702,1.5952}
h) -2x2 −x+7 = 0
{-2.1375,1.6375}
{-2.1375,1.6375}
i) 2x2 +5x−9 = 0
{1.2122,-3.7122}
{1.2122,-3.7122}
j) -3x2 +5x+5 = 0
{-0.7033,2.3699}
{-0.7033,2.3699}