Practice
Solve for x.a) 9 = x2
{-3,3}
{-3,3}
b) x2 =100
{-10,10}
{-10,10}
c) x2 −81 = 0
{-9,9}
{-9,9}
d) x2 −36 = 0
{-6,6}
{-6,6}
e) x2 −400 = 0
{-20,20}
{-20,20}
f) 169 = x2
{-13,13}
{-13,13}
g) x2 =289
{-17,17}
{-17,17}
h) x2 −225 = 0
{-15,15}
{-15,15}
i) x2 −4 = 0
{-2,2}
{-2,2}
j) 0 = x2 −81
{-9,9}
{-9,9}