1. Solve a2 – 12a = -27. A. a = 9 B. a = 3 C. a = -27 or a = -15 D. a = 3 or a = 9 Hint 2. Solve the equation by backtracking.6(x + 5) 2 – 10 = 14 A. x = 3 B. x = –7 C. x = –3 D. x = –3 and x = –7 Hint 3. Give the approximate solutions of this equation.(2z – 3) 2 – 31 = 33 A. z = 2.5 and z = –5.5 B. z = –2.5 and z = –5.5 C. z = 2.5 and z = 5.5 D. z = –2.5 and z = 5.5 Hint 4. Find the solutions of the equation.4y2 – 16 = 0 A. y = 2 and y = –2 B. y = and y = C. y = and y = D. y = –2 and y = –2 Hint 5. Find the solutions of the equation.3(x + 1)2 – 4 = 23 A. x = 4 and x = –2 B. x = 2 and x = –4 C. x = 4 and x = –4 D. x = 2 and x = –2 Hint 6. Identify the perfect square trinomial. A. 25x2 + 10x + 1 B. x2 – 16 C. x2 – 7x + 12 D. 4x2 + 6x + 2 Hint 7. In the quadratic formula, what does b2 – 4ac tell you. A. the number of solutions in a quadratic equation B. the vertex of a quadratic equation C. the places where a quadratic equation crosses the x-axis D. the solution(s) in a quadratic equation Hint 8. Find the quadratic equation with 0 solutions. A. x2 + 4x – 12 = 0 B. x2 – 2x + 5 = 0 C. x2 – 2x – 3 = 0 D. x2 – 12x + 36 = 0 Hint