Picture yourself in a ’special’ world where
Under this assumption, select the true statement/s:
We try out each possibility:
A) Every
can be ’exchanged’ for
We see if this equation
is equivalent to the original.
We multiply through by the common denominator c²
That is the correct choice. But let's see why the other one is not correct
B) Every
can be ’exchanged’ for
We see if this equation
is equivalent to the original.
We multiply through by the common denominator c²
And even if I subtract s² from both sides, I get
that is not the same as the original.
So A) is the only correct answer.
Edwin