解
展開する (x+2y+3z)4
解
x4+8x3y+12x3z+32xy3+16y4+81z4+96y3z+24x2y2+54x2z2+108xz3+216y2z2+216yz3+72x2yz+144xy2z+216xyz2
解答ステップ
(x+2y+3z)4
簡素化 (x+2y+3z)4:(x+2y+3z)(x+2y+3z)(x+2y+3z)(x+2y+3z)
=(x+2y+3z)(x+2y+3z)(x+2y+3z)(x+2y+3z)
拡張 (x+2y+3z)(x+2y+3z):x2+4xy+6xz+4y2+12yz+9z2
=(x2+4xy+6xz+4y2+12yz+9z2)(x+2y+3z)(x+2y+3z)
拡張 (x2+4xy+6xz+4y2+12yz+9z2)(x+2y+3z):x3+8y3+6x2y+9x2z+12xy2+27xz2+36y2z+54yz2+36xyz+27z3
=(x3+8y3+6x2y+9x2z+12xy2+27xz2+36y2z+54yz2+36xyz+27z3)(x+2y+3z)
括弧を分配する=x3x+x3⋅2y+x3⋅3z+8y3x+8y3⋅2y+8y3⋅3z+6x2yx+6x2y⋅2y+6x2y⋅3z+9x2zx+9x2z⋅2y+9x2z⋅3z+12xy2x+12xy2⋅2y+12xy2⋅3z+27xz2x+27xz2⋅2y+27xz2⋅3z+36y2zx+36y2z⋅2y+36y2z⋅3z+54yz2x+54yz2⋅2y+54yz2⋅3z+36xyzx+36xyz⋅2y+36xyz⋅3z+27z3x+27z3⋅2y+27z3⋅3z
簡素化 x3x+x3⋅2y+x3⋅3z+8y3x+8y3⋅2y+8y3⋅3z+6x2yx+6x2y⋅2y+6x2y⋅3z+9x2zx+9x2z⋅2y+9x2z⋅3z+12xy2x+12xy2⋅2y+12xy2⋅3z+27xz2x+27xz2⋅2y+27xz2⋅3z+36y2zx+36y2z⋅2y+36y2z⋅3z+54yz2x+54yz2⋅2y+54yz2⋅3z+36xyzx+36xyz⋅2y+36xyz⋅3z+27z3x+27z3⋅2y+27z3⋅3z:x4+8x3y+12x3z+32xy3+16y4+81z4+96y3z+24x2y2+54x2z2+108xz3+216y2z2+216yz3+72x2yz+144xy2z+216xyz2
=x4+8x3y+12x3z+32xy3+16y4+81z4+96y3z+24x2y2+54x2z2+108xz3+216y2z2+216yz3+72x2yz+144xy2z+216xyz2