consider the steps for solving 3x^2-42x+9=-5 for x by completing the square.
Step 1: 3x^2-42x=-14
Step 2: 3(x^2-14x)=-14
Step 3: 3(x^2-14x+49)=-14+_
What number should be added to the right side of the equation
Step 1: 3x^2-42x=-14
Step 2: 3(x^2-14x)=-14
Step 3: 3(x^2-14x+49)=-14+_
What number should be added to the right side of the equation