Answer:
1.x³-6x²+12x-8=0
2.27m³+54m²n+36mn²+8n
3.y³−15y²+75y−125
Step-by-step explanation:
1.(x-2)³
(x-2)(x-2)(x-2)=0
(x²-4x+4)(x-2)=0
x³-2x²-4x²+8x+4x-8=0
x³-6x²+12x-8=0
2.(3m+2n)³
=(3m+2n)(3m+2n)(3m+2n)
=3m³+3(3m)²(2n)+3(3m)(2n)²+(2n)³
=27m³+54m²n+36mn²+8n
3.(y−5)³
=(y−5)(y−5)(y−5)
=(y+−5)(y2+−10y+25)
=(y)(y²)+(y)(−10y)+(y)(25)+(−5)(y²)+(−5)(−10y)+(−5)(25)
=y³−10y²+25y−5y²+50y−125
=y³−15y²+75y−125
