Practice
Solve for x.a) x2 + 18x + 81 = 0
{-9,-9}
{-9,-9}
b) x2 − 4x + 4 = 0
{2,2}
{2,2}
c) x2 + 7x − 8 = 0
{1,-8}
{1,-8}
d) x2 − 6x − 7 = 0
{-1,7}
{-1,7}
e) x2 + 7x + 10 = 0
{-5,-2}
{-5,-2}
f) x2 − 2x − 24 = 0
{6,-4}
{6,-4}
g) x2 − 19x + 90 = 0
{9,10}
{9,10}
h) x2 + 3x − 28 = 0
{4,-7}
{4,-7}
i) x2 − 13x + 42 = 0
{6,7}
{6,7}
j) x2 + 6x + 5 = 0
{-5,-1}
{-5,-1}