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第72頁(yè)

信息發(fā)布者：

x(y+2)(y-2)

x(x-3)2

-a(a-1)2

3(a2+b2)(a+b)(a-b)

-12

$ \begin{aligned}解：原式&=-xy(x2-6x+9) \\ &=-xy(x-3)2 \\ \end{aligned}$

$ \begin{aligned}解：原式&=m3(a-2)-m(a-2) \\ &=m(a-2)(m+1)(m-1). \\ \end{aligned}$

$ \begin{aligned} 解：原式&=a[(x2+1)2-4x2] \\ &=a(x2+1+2x)(x2+1-2x) \\ &=a(x+ 1)2·(x-1)2 \\ \end{aligned}$

$ \begin{aligned}解：原式&=(x2-4x+4)2 \\ &=(x-2)?. \\ \end{aligned}$

$ \begin{aligned}解：原式&=a2(a-b)-2ab(a-b)+b2(a-b) \\ &=(a-b)(a2-2ab+b2) \\ &=(a-b)(a-b)2 \\ &=(a-b)3 \\ \end{aligned}$

2024

$ \begin{aligned}解：原式&=(p-q)^{2m-1}[(p-q)^2-1] \\ &=(p-q)^{2m-1}(p-q+1)(p-q-1) \\ \end{aligned}$

$ \begin{aligned}解：原式&=(9x2-y2)2 \\ &=(3x+y)2(3x-y)2 \\ \end{aligned}$

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