radical 2 + radical 8 all divide by radical 5- radical 8
[ √2 + √8 ] / [ √5 - √8] multiply top/bottom by √5 + √8
[ √2 + √8] [ √5 + √8] / [ 5 - 8 ] =
[ √10 + √40 + √16 + √ 64 ] / -3 =
[ √10 + 2√10 + 4 + 8 ] / -3 =
[ 12 + 3√10 ] / -3 =
3 [ 4 + √10 ] / -3
-1 [ 4 + √10 ]
-4 - √10
