因式分解2(X^2+Y^2)(X+Y)^2-(X^2-Y^2)^2

如题所述

2(X^2+Y^2)(X+Y)^2-(X^2-Y^2)^2

=2(x^2+y^2)(x+y)^2-(x+y)^2(x-y)^2

=(x+y)^2[2x^2+2y^2-(x-y)^2]

=(x+y)^2(x^2+y^2+2xy)

=(x+y)^2(x+y)^2

=(x+y)^4.
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第1个回答  2009-05-11
(X^2+Y^2)(X+Y)^2-(X^2-Y^2)^2
=(X^2+Y^2)(X+Y)^2-[(X+Y)(X-Y)]^2
=(X^2+Y^2)(X+Y)^2-(X+Y)^2(X-Y)^2
=(X+Y)^2[X^2+Y^2-(X-Y)^2]
=(X+Y)^2(X^2+Y^2-X^2+2XY-Y^2)
=2XY(X+Y)^2
第2个回答  2009-05-11
(X^2+Y^2)(X+Y)^2-(X^2-Y^2)^2
=(X^2+Y^2)(X^2+Y^2+2XY)-(X^4+Y^4-2X^2Y^2)
=(X^4+2X^2Y^2+2X^3Y+2XY^3+Y^4)-(X^4+Y^4-2X^2Y^2)
=4X^2Y^2+2X^3Y+2XY^3
=2XY(2XY+X^2+Y^2)
=2XY(X+Y)^2
第3个回答  2009-05-11
原式=2xy(x+y)^2