+304 The figure below shows the ellipse \(\frac{(x-20)^2}{20}+\frac{(y-16)^2}{16}=2016\).
Let \(R_1,R_2,R_3,\) and \(R_4\) denote those areas within the ellipse that are in the first, second, third, and fourth quadrants, respectively. Determine the value of \(R_1-R_2+R_3-R_4\).
Thank you so much for your time. 
+26367 Ellipses help
answer see here: https://web2.0calc.com/questions/a-hard-algebra-2-ellipse-question-thanks-for-the-help#r2
