A.(x-y)2 | B.(-x-y)2 | C.-(x-y)2 | D.-(x+y)2 |
A.x(y-3)2 | B.x(y+3)2 | C.x(y-9)2 | D.x(x+3)(x-3) |
A.mn(m+3)2 | B.mn(m-3)2 | C.mn(m-9)2 | D.mn(m+3)(m-3) |
A.a(a-2)2 | B.a(a2-4) | C.a(a+2)2 | D.a(a+2)(a-2) |
A.3x2(x-4y)+12xy2 | B.3x(x2-4xy+4y2) |
C.3x(x-2y)2 | D.不能分解 |
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