1) \(\left(x-2y\right)\left(x^2+2xy+4y^2\right)=x^3-8y^3\)
2) \(\left(2x+y\right)\left(4x^2+2xy+y^2\right)=8x^3+y^3\)
3) \(\left(x-3y\right)\left(x^2+3xy+9y^2\right)=x^3-27y^3\)
4) \(\left(3x-y\right)\left(9x^2+3xy+y^2\right)=27x^3-y^3\)
5) \(\left(3x-y\right)\left(9x^2+3xy+y^2\right)=27x^3-y^3\)
6) \(\left(3x-2y\right)\left(9x^2+6xy+4y^2\right)=27x^3-8y^3\)
1: =x^3-(2y)^3=x^3-8y^3
2: =(2x)^3+y^3=8x^3+y^3
3: =x^3-(3y)^3=x^3-27y^3
4: =(3x)^3-y^3=27x^3-y^3
5: =(2x)^3+(3y)^3=8x^3+27y^3
6: =(3x)^3-(2y)^3=27x^3-8y^3
`1,x^3 - 8y^3`
`2,8x^3 + y^3`
`3,x^3 - 27y^3`
`4,27x^3 - y^3`
`5,8x^3 + 27y^3`
`6,27x^3 - 8y^3`
