Decide what number must be added to the binomial to make a perfect square trinomial.

Consider the binomial Ax² + Bx

Step 1: factor out A  ⇒ A(x² + x)

Step 2: divide the "x" term by 2   ⇒   A(x² + x)

Step 3: square the coefficient of the "x" term and add it to the binomial  ⇒   A(x² + x + ()²)

()²

question is incomplete.