Given x<5 and y>8
Let x<5 ------ (1)
Consider y>8
āāy<ā8 ------- (2)
adding (1) and (2)
x+(āy)<(5)+(ā8)
xāy<5ā8
xāy<ā3
(xāy)>|ā3|
ā|xāy|>3
if x-y=5 and xy=84,then find the value of x3 - y3