Question

(-2xy-3)^3

 

Answer 1

`(-2xy-3)^3`

`=(-2xy)^3-3.(-2xy)^2 .3+3.(-2xy).3^2-(-3)^3`

`=-8x^3y^3-36x^2y^2-54xy+27`

Answer 2

(-2xy-3)^3=-(2xy+3)^3=-((2xy)^3+3.(2xy)^2.3+3.2xy.3^2+3^3)

=-(8x^3y^3+36x^2y^2+54xy+27)

=-8x^3y^3-36x^2y^2-54xy-27

Answer 3

\(=\left(-2xy\right)^3-3.\left(-2xy\right)^2.3+3.\left(-2xy\right).3^2-3^3\)

\(=-8x^3y^3-9.4x^2y^2+27.-2xy-27\)

\(=-8x^3y^3-36x^2y^2-54xy-27\)

Answer 4

(-2xy-3)^3

= (-2xy)³ - 3.(-2xy)² . 3 + 3.-2xy . 3² - 3³

= -8x³y³ - 3.4x²y² . 3 + 3 .-2xy . 9 - 27

= -8x³y³ - 36x²y² - 54xy - 27