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cobi18

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**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 (p^2c^2). If anyone could help that would be great!