Simple algebra to find the strict mass–energy equivalence formula, and I can't do it!
find ((m^2)*(c^4)=(E^2)-(p^2*c^2)) from (E=m*c^2*y) (p=m*y*v)
(y=1/(1-(v^2/c^2))^(1/2))
Yeh i can find the m^2c^4 parts and the E^2 obvioulsy. but then i am stuck with E^2(v^2/c^2) when instead i want...