Quadratic equations

Question 4 (2 points) Jerome solved an equation using the following steps: Step 1: 16x2 - 64 = 0 Step 2: 16x2 = 64 Step 3: X2 = 4 Step 4: Vx2 = V4 Step 5: x = 2 a) In which step did Jerome made the first error? Explain what he did incorrectly. (0.5 mark) b) Solve the equation correctly, writing out all the steps. (1.5 marks)Question 3 (3 points) A rock is tossed from the top of a bridge into the water below and is represented by the function f(x) = -2x2 + 5x + 18, where f(x) is the height of the rock in metres and x is the time in seconds. a) Algebraically determine the zeros of the function. (2.5 marks) b) How long did it take for the rock to enter the water? Round your answer to the nearest tenth. (0.5 mark) stion 4 (2 points)Question 6 (2 points) A quadratic function is represented in the graph below. The intercepts and vertex have integer coordinates. Algebraically determine its equation in factored form. -2 A