Practice
Solve for x.a) 1x2 −5x−5 = 0
{5.8541,-0.8541}
{5.8541,-0.8541}
b) -5x2 −9x+1 = 0
{-1.905,0.105}
{-1.905,0.105}
c) 2x2 +4x+1 = 0
{-0.2929,-1.7071}
{-0.2929,-1.7071}
d) 6x2 −9x+3 = 0
{1,0.5}
{1,0.5}
e) -6x2 +9x+2 = 0
{-0.1965,1.6965}
{-0.1965,1.6965}
f) -3x2 −6x+7 = 0
{-2.8257,0.8257}
{-2.8257,0.8257}
g) 9x2 +3x−1 = 0
{0.206,-0.5393}
{0.206,-0.5393}
h) 7x2 +6x−3 = 0
{0.3539,-1.211}
{0.3539,-1.211}
i) -5x2 +4x+5 = 0
{-0.677,1.477}
{-0.677,1.477}
j) -1x2 −7x−1 = 0
{-6.8541,-0.1459}
{-6.8541,-0.1459}