Question

$\boxed{pls answer\: my question}$

Find the value of x^3 + y^3 + 9xy - 27 , when x + y = 3.​

Answer 1

x+y=3

cube both sides

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

27=x3+y3+3xy(x+y)

27=x3+y3+3xy(3)

27=x3+y3+9xy ......... (1)

x3+y3+9xy-27

from equation (1)

27-27

0

HOPE IT HELPS YOU

Answer 2

Hi buddy

Here is your answer