Name: Factoring: Assignment Activity 4 1. Factor. (2 marks each) a) y=x -gr-33 b) y=x' -12r+ll c) y=x + 75+6 dj yux -8x +12 e) y=5x + 45r+70 () yox' +Or-64 2. State the y-intercept for each equation in question 1. (6 marks) 3. State the roots (x-intercepts) for each equation in question 1. (6 marks) 4. When it is useful to factor? (2 mark) 5. A ball is thrown from the top of a building and lands on the ground below. The equation that best represents this toss is y= -5+ 5/ + 30, where h is the height above the ground in metres and f is time in seconds. a. How tall is the building? (1 mark) b. When will the ball hit the ground? (3 marks) (Remember to factor out a -5 first)