Question 55475
49x^2-4=0 [Set the equation equal to zero]
49x^2=4 
sqrt49x^2=sqrt4
7x=2
x=2/7
.
Check by plugging (x=2/7) back into the original equation.
49(2/7)^2-4=0 
4-4=0
0=0 [checks out]