Practice
Solve for x.a) 7x2 −x−1 = 0
{0.4561,-0.3132}
{0.4561,-0.3132}
b) 6x2 −9x−2 = 0
{1.6965,-0.1965}
{1.6965,-0.1965}
c) 6x2 −8x+1 = 0
{1.1937,0.1396}
{1.1937,0.1396}
d) 7x2 +3x−7 = 0
{0.8084,-1.237}
{0.8084,-1.237}
e) 3x2 +9x−4 = 0
{0.393,-3.393}
{0.393,-3.393}
f) -5x2 +8x+4 = 0
{-0.4,2}
{-0.4,2}
g) -3x2 −2x+6 = 0
{-1.7863,1.1196}
{-1.7863,1.1196}
h) 9x2 +3x−3 = 0
{0.4343,-0.7676}
{0.4343,-0.7676}
i) 5x2 −9x−9 = 0
{2.5155,-0.7155}
{2.5155,-0.7155}
j) -3x2 −x+6 = 0
{-1.5907,1.2573}
{-1.5907,1.2573}