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Expressing y in terms of x means to have an equation in the form:
y = expression with x in it
(or expression with x in it = y)
This will require that y not be in a denominator or in a square root. So we will eliminate the fraction first then the square root and then we will see what needs to happen next.
Multiplying both sides by the square root (i.e. the denominator) will eliminate the fraction:
With just one term on the left side the square root is isolated (which is required to eliminate it). So we can eliminate the square root by squaring both sides:
Now we solve for y. First we gather the y terms on one side of the equation. Subtracting from each side:
Since the terms on the right side are not like terms we cannot combine them. But we can factor out the :
Dividing both sides by :
And finally we find the square root of each side (remembering both square roots (positive and negative)): +
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