Question

find the value of xcube +ycube +15xyz -125 if x+y =5​

Answer 1

Answer:

0

Step-by-step explanation:

Given:

x+y=5

Cubing on both sides

x^3+y^3+3xy(x+y)=125

x^3+y^3+3xy(5)-125=0{x+y=5}

So x^3+y^3+15xy-125=0