Which operation is performed in the derivation of the quadratic formula moving from Step 6 to Step 7? subtracting from both sides of the equation squaring both sides of the equation taking the square root of both sides of the equation taking the square root of the discriminant
it's "taking square root of both sides of the equation"
as the power 2 from the right side of the equation disappeared it means that the it's square root has been taken as square root is the opposite of power 2 and it's easily identifiable that it is been square rooted from the right side of the equation as well
