Question

what is the resulting equation after isolating y from x²+y²=49

Answer 1

Let's solve for x.
X^2 +y^2=49

Step 1: Add -y^2 to both sides.
X^2+y^2+-y^2=49+-y^2

Step 2; take square root
X= square root -y^2 +49 or x= negative square root y^2 +49