Let a, b, c, and d be distinct real numbers such that a=√4+√5+a,b=√4−√5+b,c=√4+√5−c,d=√4−√5−d. Compute abcd.
I found it here!
https://web2.0calc.com/questions/let-a-b-c-and-d-be-distinct-real-numbers-such-that
+25 
