aalokmaths
Apr 30, 2010, 03:23 AM
Find the area of the region included between the circle: x2 + y2 + 2 x + 10y + 27 = 0 and the parabola y2 + 10y – x + 23 = 0
galactus
Apr 30, 2010, 05:19 PM
Check and make sure there is not a typo in the circle equation. Maybe that should be -27?
As is, it has a negative radius which is infeasible.
galactus
May 1, 2010, 10:37 AM
Assuming there was a typo with the circle equation, I am going to go with
x^{2}+y^{2}+2x+10y-27=0
Completing the square, we get:
(x+1)^{2}+(y+5)^{2}=53
The circle has center at (-1,-5) and has radius \sqrt{53}\approx 7.28
Solving this for y, we get:
y=-\sqrt{-x^{2}-2x+52}-5 and
y=\sqrt{-x^{2}-2x+52}-5
The parabola can be solved for y and we get:
y=-\sqrt{x+2}-5
\sqrt{x+2}-5
Now, use this info, along with some integration, to find the area.
Please use ^ to designate powers. x2 looks like x times 2.