Answer:
x = -1 +/-2i
Step-by-step explanation:
Write the equation in standard form to find the roots, also known as the solutions, zeros, or x-intercepts, of the quadratic.
x² + 2x + 5 = 0
Use the quadratic formula by substituting a= 1, b = 2 and c = 5.
![x = \frac{-2 +/- \sqrt{(-2)^2 - 4(1)(5)} }{2(1)} = \frac{-2 +/-\sqrt{4 -20 } }{2} = \frac{-2 +/-\sqrt{-16 } }{2} = \frac{-2 +/-4i }{2} = -1 +/-2i](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-2%20%2B%2F-%20%5Csqrt%7B%28-2%29%5E2%20-%204%281%29%285%29%7D%20%7D%7B2%281%29%7D%20%3D%20%5Cfrac%7B-2%20%2B%2F-%5Csqrt%7B4%20-20%20%7D%20%7D%7B2%7D%20%3D%20%5Cfrac%7B-2%20%2B%2F-%5Csqrt%7B-16%20%7D%20%7D%7B2%7D%20%3D%20%5Cfrac%7B-2%20%2B%2F-4i%20%7D%7B2%7D%20%3D%20-1%20%2B%2F-2i)
Answer:
the answer is 56.00 dollars
Step-by-step explanation:
I did this
Answer: only C and E
Step-by-step explanation:
Answer:
The volume of the cylinder is 25.12
Step-by-step explanation:
The width is the diameter in the circle of the base
radius = half of diameter
r = 2/2 = 1
To calculate the volume of a cylinder we have to use the following formula:
v = volume
h = height = 8
π = 3.14
r = radius = 1
v = (π * r²) * h
we replace the unknowns with the values we know
v = (3.14 * (1)²) * 8
v = (3.14 * 1) * 8
v =3.14 * 8
v = 25.12
The volume of the cylinder is 25.12