Practice
Solve for x.a) 10x2 + 21x − 10 = 0
{2/5,-5/2}
{2/5,-5/2}
b) 10x2 − 21x − 10 = 0
{-2/5,5/2}
{-2/5,5/2}
c) 3x2 − 16x + 5 = 0
{1/3,5}
{1/3,5}
d) 12x2 − 11x − 5 = 0
{-1/3,5/4}
{-1/3,5/4}
e) 6x2 + 23x + 20 = 0
{-4/3,-5/2}
{-4/3,-5/2}
f) 10x2 + 17x − 20 = 0
{4/5,-5/2}
{4/5,-5/2}
g) 28x2 − 37x + 12 = 0
{4/7,3/4}
{4/7,3/4}
h) 5x2 + 23x − 10 = 0
{2/5,-5}
{2/5,-5}
i) 12x2 − 5x − 3 = 0
{-1/3,3/4}
{-1/3,3/4}
j) 20x2 + 19x + 3 = 0
{-1/5,-3/4}
{-1/5,-3/4}