Question

What does y equal ?
4y^2= 5.76
y =

Answer 1

the answer is 1.2. 
so you divid 5.76 by 4, and get 1.44, and then find the square root of 1.44 which is 1.2 

Answer 2

Take the square root of each side and y = {-1. 2, 1. 2}hope this helps :-)