Heyo!
RummySokka is here to help!!
Let's do this step-by-step explanation!
: Let's solve for the y.

Step 1: Flip the equation.

Step 2: Add a- to your both sides.


Step 3: Divide both sides by -2b.


Step 4: Take square root.

Answer:

Hopefully, this helps you!!
RummySokka~