Questions on Algebra: Distributive, associative, commutative properties, FOIL answered by real tutors!

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Question 151642: Please help!
c=+/-√E/m: Please help!
c=+/-√E/m
Answer by jim_thompson5910(9401) About Me  (Show Source):
You can put this solution on YOUR website!
Do you want to solve for "E"?

c=0+-sqrt(E/m) Start with the given equation.


c^2=E/m Square both sides


mc^2=cross(m)(E/cross(m)) Multiply both sides by "m".


mc^2=E Simplify


E=mc^2 Rearrange the equation


So the solution is E=mc^2


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Do you want to solve for "m"?

c=0+-sqrt(E/m) Start with the given equation.


c^2=E/m Square both sides


mc^2=cross(m)(E/cross(m)) Multiply both sides by "m".


mc^2=E Simplify


m=E/(c^2) Divide both sides by c^2.


So the solution is m=E/(c^2)