Question

Find the value of x3 + y3 + 15xy 125 if x + y = 5.

Answer 1

Step-by-step explanation:

if x+y=5

then

common of 3 or divide by 3,

x+y+5xy=0

put the value,

5+5xy=0

5xy=-5

xy=-1

x=-1/y

eqn 1

put x and solve for y

thank you

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