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1. question:
by eliminating x and y from these equations

where a\neq 0 , obtain a relation between m and a. Given that a is real, determine the ranges of values of a for which m is real.

I managed to get
but the question as to give the ranges of a.
from what i learn for instance if you can be asked to find the range of values of x.
but for this question i got .
As a result, it is difficult for me to find the range of values of a as a is not where m is.
How do i rearrange it to have m as the dependent variable in order to find the range of a

thank you
2. Rearrange for m, you will need to solve a quadratic in m, but be careful not to get rid of half of the curve when you do.

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Updated: September 19, 2016
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