Question

а) 27х^3-у^3
б)у^3+64

Answer 1

$27x^3-y^3=(3x-y)(9x^2+3xy+y^2)\\y^3+64=y^3+4^3=(y+4)(y^2-4y+16)$

Answer 2

а) 27х^3-у^3=(3x-y)(9x^2+3xy+y^2)
б)у^3+64=(y+4)(y^2-4y+16)