Practice
Solve for x.a) 0 = 4x2 −225
{-15/2,15/2}
{-15/2,15/2}
b) 25x2 −169 = 0
{-13/5,13/5}
{-13/5,13/5}
c) 0 = 81x2 −64
{-8/9,8/9}
{-8/9,8/9}
d) 81x2 −121 = 0
{-11/9,11/9}
{-11/9,11/9}
e) 9x2 =25
{-5/3,5/3}
{-5/3,5/3}
f) 4x2 −81 = 0
{-9/2,9/2}
{-9/2,9/2}
g) 16x2 −225 = 0
{-15/4,15/4}
{-15/4,15/4}
h) 0 = 49x2 −121
{-11/7,11/7}
{-11/7,11/7}
i) 0 = 49x2 −25
{-5/7,5/7}
{-5/7,5/7}
j) 49 = 36x2
{-7/6,7/6}
{-7/6,7/6}