Answer:
The center of circle is
Step-by-step explanation:
We need to find the center of the circle of the equation 
Since, the general equation of circle is 
Where (h,k) is center of circle and r is radius.
Re-write the circle equation is
as,

Compare
with 
so, 
Hence, the center of circle is 
F = d + e + t Flip the sides to put t on the left
d + e + t = F Subtract d from both sides
e + t = F - d Subtract e from both sides
t = F - d - e
Hey!!
here is your answer >>>
If lenght and width are given, it must be a rectangle ,
the formula for the perimeter of rectnagle is
2 ( Lenght + breadth )
Lenght is 6ft
Width = ?
perimeter = 26
2 ( 6 + Width ) = 26
6 + Width = 13
Width = 7ft
Hope my answer helps!
F(x)= (x+13)(x-2) in expanded form, it would be x^2+11x-26