Practice
Solve for x.a) 81x2 =16
{-4/9,4/9}
{-4/9,4/9}
b) 0 = 81x2 −196
{-14/9,14/9}
{-14/9,14/9}
c) 0 = 64x2 −169
{-13/8,13/8}
{-13/8,13/8}
d) 4x2 −225 = 0
{-15/2,15/2}
{-15/2,15/2}
e) 16x2 =25
{-5/4,5/4}
{-5/4,5/4}
f) 49x2 =16
{-4/7,4/7}
{-4/7,4/7}
g) 16 = 49x2
{-4/7,4/7}
{-4/7,4/7}
h) 49x2 −81 = 0
{-9/7,9/7}
{-9/7,9/7}
i) 121 = 64x2
{-11/8,11/8}
{-11/8,11/8}
j) 16x2 −169 = 0
{-13/4,13/4}
{-13/4,13/4}