Practice
Solve for x.a) 1x2 +x−7 = 0
{2.1926,-3.1926}
{2.1926,-3.1926}
b) 7x2 +3x−4 = 0
{0.5714,-1}
{0.5714,-1}
c) -9x2 −6x+3 = 0
{-1,0.3333}
{-1,0.3333}
d) 8x2 −2x−3 = 0
{0.75,-0.5}
{0.75,-0.5}
e) 5x2 −4x−3 = 0
{1.2718,-0.4718}
{1.2718,-0.4718}
f) 1x2 +7x−1 = 0
{0.1401,-7.1401}
{0.1401,-7.1401}
g) -7x2 +6x+5 = 0
{-0.519,1.3762}
{-0.519,1.3762}
h) 5x2 −5x−3 = 0
{1.422,-0.422}
{1.422,-0.422}
i) 2x2 −5x−9 = 0
{3.7122,-1.2122}
{3.7122,-1.2122}
j) -3x2 +x+5 = 0
{-1.135,1.4684}
{-1.135,1.4684}