Answer:
Step-by-step explanation:
eq. of circle is x²+y²+2gx+2fy+c=0
center=(-g,-k)
given eq. is x²+y²+4x-8y+11=0
comparing
2gx=4x
g=2
2fy=-8y
f=-4
center=(-2,4)
<span>It is a line that touches only one point on the circle. Not so: that's a tangent line.
It is a line that joins a point on the circle with the center of the circle. Not so: that's a radius.
It is a line that divides the circle into two equal halves. Not so; that's a diameter.
It is a line that intersects the circle at two points. True.</span>
Answer:
Lines e & f are parallel to eachother and lines g & h are parallel to eachother
Step-by-step explanation:
Parallel lines never intersect.
Answer:
b:not similar
Step-by-step explanation:
Answer:
a = 2, b = 3.5
Step-by-step explanation:
Expanding 
using Binomial expansion, we have that:
=
We have that the coefficients of the first two terms are 128 and -224.
For the first term:
=> 
=> ![a = \sqrt[7]{128}\\ \\\\a = 2](https://tex.z-dn.net/?f=a%20%3D%20%5Csqrt%5B7%5D%7B128%7D%5C%5C%20%5C%5C%5C%5Ca%20%3D%202)
For the second term:
Therefore, a = 2, b = 3.5
