The ball will hit the ground at 2 seconds. 
Step-by-step explanation:
Given that, 
The path of the ball = h(x)=−2x2+1x+6
Here, 
x is the time while h is the height of ball.
When the ball will hit the ground, the height will become zero. Therefore,
h(x)=−2x2+1x+6
0 =−2x2+1x+6
or 
2x2 -1x - 6 = 0 
This is a quadratic equation, hence by applying quadratic equation formula:

here, 
a = 2
b = -1
c = -6
Putting these values in formula, we get 




x = 2, -3/2
As the time cannot be negative. Therefore, the ball will hit the ground at 2 seconds. 
 
        
                    
             
        
        
        
Answer:
6
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
false
Step-by-step explanation:
-5,-4,-3,-2,-1,0,1,2,3,4,5