Question

if x = 2, y = -7 then the value of 27x^3 + 27x^3.y 9xy^2y^3 is equal to​

Answer 1

Answer:

-1

Step-by-step explanation:

27x^3 + 27x^2y + 9xy^2 + y^3

= ( 3x)^3 + 3. ( 3x) ^2. y + 3. 3x. y^2 + y^3

= ( 3x + y) ^3

= [ 3×2 + (-7) ] ^3

= (6-7)^3

= (-1)^3

= -1