Question

If x+y=8 and x*y=15, find the value of x^3-y^3

Answer 1

Step-by-step explanation:

x=8-y

y=15/x

y^2-8y+15=0

(y-3)(y-5)=0

y=3,5

so,x=5,3

the final ans is 125-27

or 27-125