(2X-Y)方-4(X-2Y)(X+2Y)
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(2X-Y)方-4(X-2Y)(X+2Y)(2X-Y)方-4(X-2Y)(X+2Y)(2X-Y)方-4(X-2Y)(X+2Y)(2X-Y)方-4(X-2Y)(X+2Y)=4x^2-4xy+y^2-4(
(2X-Y)方-4(X-2Y)(X+2Y)
(2X-Y)方-4(X-2Y)(X+2Y)
(2X-Y)方-4(X-2Y)(X+2Y)
(2X-Y)方-4(X-2Y)(X+2Y)
=4x^2-4xy+y^2-4(x^2-4y^2)
=4x^2-4xy+y^2-4x^2+16y^2
=17y^2-4xy
—15y方—4xy
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4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
(2X-Y)方-4(X-2Y)(X+2Y)
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