Question

simplify: (2x+36)³ -(2x-3y)³​

Answer 1

Answer:

2x+3y=12 xy=6

8x

3

+27y

3

=(2x)

3

+(3y)

3

=a

3

+b

3

=(a+b)(a

2

+b

2

−ab)

8x

3

+27y

3

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

2

+(3y)

2

−(2x)(3y))

=(12)[(2+3y)

2

−12xy−6xy]

=(12)[(12)

2

−18(6)]

=12[144−108]

=12×36

=432.