Practice
Solve for x.a) 0 = 4x2 −225
{-15/2,15/2}
{-15/2,15/2}
b) 225 = 64x2
{-15/8,15/8}
{-15/8,15/8}
c) 81x2 =25
{-5/9,5/9}
{-5/9,5/9}
d) 49x2 =25
{-5/7,5/7}
{-5/7,5/7}
e) 25x2 =144
{-12/5,12/5}
{-12/5,12/5}
f) 49x2 =169
{-13/7,13/7}
{-13/7,13/7}
g) 9x2 −100 = 0
{-10/3,10/3}
{-10/3,10/3}
h) 4x2 −169 = 0
{-13/2,13/2}
{-13/2,13/2}
i) 9x2 =64
{-8/3,8/3}
{-8/3,8/3}
j) 4 = 25x2
{-2/5,2/5}
{-2/5,2/5}