因式分解以下题目x2(2为次数,下同)+x+1(x+y)4+x4+y46x4+7x3y+5x2y2-xy3-2y4x3-
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因式分解以下题目
x2(2为次数,下同)+x+1
(x+y)4+x4+y4
6x4+7x3y+5x2y2-xy3-2y4
x3-7x-6
x3-48x-7
(m2-1)(n2-1)+4mn
x2(2为次数,下同)+x+1
(x+y)4+x4+y4
6x4+7x3y+5x2y2-xy3-2y4
x3-7x-6
x3-48x-7
(m2-1)(n2-1)+4mn
![因式分解以下题目x2(2为次数,下同)+x+1(x+y)4+x4+y46x4+7x3y+5x2y2-xy3-2y4x3-](/uploads/image/z/20171115-27-5.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E4%BB%A5%E4%B8%8B%E9%A2%98%E7%9B%AEx2%EF%BC%882%E4%B8%BA%E6%AC%A1%E6%95%B0%2C%E4%B8%8B%E5%90%8C%EF%BC%89%2Bx%2B1%28x%2By%294%2Bx4%2By46x4%2B7x3y%2B5x2y2-xy3-2y4x3-)
4、x³-7x-6=x³-3x²+3x²-7x-6=x²(x-3)+(x-3)(3x+2)=(x-3)(x+2)(x+1)
5、x³-48x-7=x³-7x²+7x²-48x-7=x²(x-7)+(x-7)(7x+1)=(x-7)(x²+7x+1)
5、x³-48x-7=x³-7x²+7x²-48x-7=x²(x-7)+(x-7)(7x+1)=(x-7)(x²+7x+1)
若x+y=-1,则x4+5x3y+x2y+8x2y2+xy2+5xy3+y4的值等于( )
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