Practice
Solve for x.a) 81x2 −196 = 0
{-14/9,14/9}
{-14/9,14/9}
b) 0 = 9x2 −49
{-7/3,7/3}
{-7/3,7/3}
c) 196 = 9x2
{-14/3,14/3}
{-14/3,14/3}
d) 0 = 9x2 −100
{-10/3,10/3}
{-10/3,10/3}
e) 0 = 25x2 −144
{-12/5,12/5}
{-12/5,12/5}
f) 16 = 49x2
{-4/7,4/7}
{-4/7,4/7}
g) 4x2 =49
{-7/2,7/2}
{-7/2,7/2}
h) 169 = 36x2
{-13/6,13/6}
{-13/6,13/6}
i) 4x2 −9 = 0
{-3/2,3/2}
{-3/2,3/2}
j) 0 = 25x2 −4
{-2/5,2/5}
{-2/5,2/5}