Practice
Solve for x.a) 0 = x2 −400
{-20,20}
{-20,20}
b) 25 = x2
{-5,5}
{-5,5}
c) x2 =196
{-14,14}
{-14,14}
d) 9 = x2
{-3,3}
{-3,3}
e) 0 = x2 −121
{-11,11}
{-11,11}
f) x2 −121 = 0
{-11,11}
{-11,11}
g) 225 = x2
{-15,15}
{-15,15}
h) 0 = x2 −324
{-18,18}
{-18,18}
i) 36 = x2
{-6,6}
{-6,6}
j) 0 = x2 −36
{-6,6}
{-6,6}