Use the quadratic equation x 2 − 12 x = 28 to answer the following questions. Part A : Suppose an equivalent quadratic equation is written: x 2 − 12 x + c = 28 + c . What value of c would make the equation a perfect square trinomial? Part B : Rewrite the equation in the form ( x − h ) 2 + k = 0 . Part C : Solve the quadratic equation to find the positive solution for x . Part D : Solve the quadratic equation to find the negative solution for x .
