(2 - 3i) - (-2 - 3i)
distribute the negative through the second set of parenthesis.
2 - 3i + 2 + 3i
Combine like terms; real part with real part and imaginary part with imaginary part.
4 + 0i
This is the concept of trajectories;
We are required to calculate the time taken for the base ball whose distant to reach the maximum height has been modeled by h=-16t^2+64t+4.2 took to hit the ground. Here we proceed as follows;
At the time when the base ball hits the ground the height,h=0
Thus;
-16t^2+64t+4.2=0
this is a quadratic equation, to solve the quadratic equation we use the formula;
t=[-b+/- sqrt(b^2-4ac)]/(2a)
where;
a=-16,b=64, c=4.2
thus substituting the values in our formula we get:
t=[-64+/-sqrt(64^2-4*(-16)*4.2)]/(-16*2)
t=[-64+/- sqrt(4364.8)]/(-32)
t=[-64+/-66.1]/(-32)
t=4.1 or-0.1
thus the we take the positive value t=4.1 and we conclude that the time taken for the ball to hit the ground was 4.1 seconds
You are adding 6 to each number. (N-1)+6, I guess
Answer:
(x, y) = (18/5, 16/5)
OR
(x, y) = (3.6, 3.2)
