Noone: 4s^2=32s
First put it all on one side and then factorise out the s
4s
2 - 32s = 0
s(4s - 32) = 0
Now you have 2 things that multiply together to give 0
That means that either one or the other (or both) have to be equal to 0.
so
either s=0 or 4s-32 = 0
You can finish it.
+118654 
