H=-16t^2+-(304)/2(-16) How long does it take the projectile to reach its maximum height. Use the vertex formula to determine the time it takes the projectile to reach its maximum height.

Part 3 find the time it takes the projectile to return to the ground. Assume that the projectile starts at height H=0

17   x 256=4352

sorry if this is wrong, i'm new.

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.