Practice
Solve for x.a) 4x2 =81
{-9/2,9/2}
{-9/2,9/2}
b) 0 = 81x2 −196
{-14/9,14/9}
{-14/9,14/9}
c) 0 = 25x2 −196
{-14/5,14/5}
{-14/5,14/5}
d) 9x2 =196
{-14/3,14/3}
{-14/3,14/3}
e) 49x2 =144
{-12/7,12/7}
{-12/7,12/7}
f) 16x2 =81
{-9/4,9/4}
{-9/4,9/4}
g) 0 = 49x2 −25
{-5/7,5/7}
{-5/7,5/7}
h) 64x2 −49 = 0
{-7/8,7/8}
{-7/8,7/8}
i) 81x2 =64
{-8/9,8/9}
{-8/9,8/9}
j) 0 = 4x2 −169
{-13/2,13/2}
{-13/2,13/2}