Practice
Solve for x.a) x2 + 8x − 9 = 0
{-9,1}
{-9,1}
b) x2 − 11x + 28 = 0
{4,7}
{4,7}
c) x2 + 8x + 12 = 0
{-2,-6}
{-2,-6}
d) x2 + 7x + 10 = 0
{-5,-2}
{-5,-2}
e) x2 + 10x + 21 = 0
{-7,-3}
{-7,-3}
f) x2 − x − 20 = 0
{5,-4}
{5,-4}
g) x2 + 4x − 5 = 0
{1,-5}
{1,-5}
h) x2 + 15x + 56 = 0
{-8,-7}
{-8,-7}
i) x2 + 6x + 5 = 0
{-5,-1}
{-5,-1}
j) x2 − 8x + 15 = 0
{3,5}
{3,5}
