#1 A golfer hits the golf ball. The quadratic function y = −16 x 2 + 80 x gives the time x seconds when the golf ball is at height 0 feet. How long does it take for the golf ball to return to the ground?
#2 Use the Zero Product Property to solve the equation ( x – 4)( x + 5) = –18.
#3 Solve the equation 64 x 2 − 144 = −23 by using square roots.
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