Practice
Solve for x.a) -4x2 −9x−2 = 0
{-2,-0.25}
{-2,-0.25}
b) -8x2 −4x+5 = 0
{-1.0792,0.5792}
{-1.0792,0.5792}
c) 6x2 +5x−5 = 0
{0.5868,-1.4201}
{0.5868,-1.4201}
d) -6x2 +5x+5 = 0
{-0.5868,1.4201}
{-0.5868,1.4201}
e) 2x2 −4x−1 = 0
{2.2247,-0.2247}
{2.2247,-0.2247}
f) 5x2 −6x−2 = 0
{1.4718,-0.2718}
{1.4718,-0.2718}
g) -1x2 +7x+7 = 0
{-0.8875,7.8875}
{-0.8875,7.8875}
h) 7x2 +8x−4 = 0
{0.3762,-1.519}
{0.3762,-1.519}
i) 2x2 −4x+2 = 0
{1,1}
{1,1}
j) -1x2 −8x+7 = 0
{-8.7958,0.7958}
{-8.7958,0.7958}