​(a) Use factoring to determine when the golf ball strikes the ground.

Question

If a golf ball is hit with an upward velocity of

64 feet per​ second, its height h in feet above the ground can be modeled by

h left parenthesis t right parenthesis equals negative 16 t squared plus 64,

where t is in seconds.

Answer 1

0 = -16t^2 + 64

0 = t^2 - 4 <---- factors out 16 and divides it out

0 = (t+2)(t-2) <--- factors difference of squares

t+2 = 0 results in negative times

t-2 = 0 ---> t = 2

2 seonds