1.x²-(2/5)xy+(1/25)y²=(1/25)( )²2.用提公因式分解因式时,从多项式17a^5-34a^3-51a^4中提出的公因式是()3.x²-px-q=(x-1)(x-3)则p=(),q=( ).20.要使(x-1)(x+3)(x-4)(x-8)+m为完全平方式,求m的值
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