2xy²×A=6x²y²-4x³y³,那么A=
题目
2xy²×A=6x²y²-4x³y³,那么A=
答案
(A-2)(A ^ 2 + 2A + 4)= A(A2 + 2A + 4)-2(A2 + 2A + 4)= A3 + 2A2 + 4A-2a2-4a -8 = A3-8 (2X-Y)(4X ^ 2 + 2XY + Y ^ 2)= 2×(4×2 + 2XY + Y2) - Y(4×2 + 2XY + Y2)= 8X3 + 4x2y + 2xy2-4x2y-2xy...
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