Question

anser it. hgifu gxovtY

Answer 1

your answer is

27^3-180xy--125y^3-64

Answer 2

(3x-5y-4)(9x²+25y²+15xy+12x-20y+16)

           =3x(9x²+25y²+15xy+12x-20y+16) -5y(9x²+25y²+15xy+12x-20y+16)      -4(9x²+25y²+15xy+12x-20y+16)

           =27x³+75xy²+45x²y+36x²-60xy+48x-45x²y -125y³-75xy²-60xy+100y²-80y-36x²-100y²-60xy-48x+80y-64

           =27x³+75xy²-75xy²+45x²y-45x²y+36x²-36x²-60xy-60xy-60xy+48x -48x-125y³+100y²-100y²-80y+80y-64

         ⇒27x³-180xy-125y³-64

HOPE IT HELPS...