Practice
Solve for x.a) 121 = 81x2
{-11/9,11/9}
{-11/9,11/9}
b) 9x2 =121
{-11/3,11/3}
{-11/3,11/3}
c) 9x2 =169
{-13/3,13/3}
{-13/3,13/3}
d) 121 = 81x2
{-11/9,11/9}
{-11/9,11/9}
e) 9x2 −25 = 0
{-5/3,5/3}
{-5/3,5/3}
f) 169 = 36x2
{-13/6,13/6}
{-13/6,13/6}
g) 4x2 =225
{-15/2,15/2}
{-15/2,15/2}
h) 25x2 =4
{-2/5,2/5}
{-2/5,2/5}
i) 16x2 −9 = 0
{-3/4,3/4}
{-3/4,3/4}
j) 0 = 4x2 −49
{-7/2,7/2}
{-7/2,7/2}