问题标题：
几道数学题分解因式(a-3)^2+(3-a)-16x^2y^2+12xy^5-8xz^3x^4-46x^2+254x^2-y^2-2y-1(^2即是平方,^4即是四次方)非零数A,B满足4A^2+B^2=4AB,则B/A=
问题描述：
几道数学题分解因式
(a-3)^2+(3-a)-16x^2y^2+12xy^5-8xz^3x^4-46x^2+25
4x^2-y^2-2y-1(^2即是平方,^4即是四次方)
非零数A,B满足4A^2+B^2=4AB,则B/A=
刘再群回答：
(a-3)^2+(3-a)=(a-3)^2-(a-3)=(a-3)(a-4)...-16x^2y^2+12xy^5-8xz^3=-4x(4xy^2-3y^5+2z^3)...x^4-46x^2+25=x^4-10x^2+25-36x^2=(x^2-5)^2-(6x)^2=(x^2+6x-5)(x^2-6x-5)...4x^2-y^2-2y-1...
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