HELPPP ON THESE TWO PROBLEMS!
Simplify (2n-2)(n+3) + (n+2)(n-6).
The equation y = -6t^2 - 10t + 56 describes the height (in feet) of a ball thrown downward at 10 feet per second from a height of 56 feet from the surface from Mars. In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest hundredth.