Given:
The height of ball is represented by the below function:
To find:
The number of seconds it will take to reach the ground.
Solution:
We have,
At ground level, the height of ball is 0, i.e., .
Taking out greatest common factor.
Splitting the middle term, we get
Using zero product property, we get
and
and
Time cannot be negative, so .
Therefore, the ball will reach the ground after 2 seconds.