Practice
Solve for x.a) x2 −400 = 0
{-20,20}
{-20,20}
b) x2 −121 = 0
{-11,11}
{-11,11}
c) x2 −64 = 0
{-8,8}
{-8,8}
d) 16 = x2
{-4,4}
{-4,4}
e) 64 = x2
{-8,8}
{-8,8}
f) x2 =289
{-17,17}
{-17,17}
g) x2 −121 = 0
{-11,11}
{-11,11}
h) x2 =121
{-11,11}
{-11,11}
i) x2 −25 = 0
{-5,5}
{-5,5}
j) 0 = x2 −225
{-15,15}
{-15,15}