X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)
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X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)X^2(4A^2-9B^2
X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)
X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)
X^2(4A^2-9B^2)+Y^2(9B^2-4A^2)
X^2(4A^2-9B^2)+Y^2(9B^2-4A^2) =4x^2*A^2-4y^2*A^2+9y^2B^2-9x^2B^2 =4A^2(x^2-y^2)-9B^2(x^2-y^2) =(x^2-y^2)(4A^2-9B^2) =(x+y)(x-y)(2A+3B)(2A-3B)
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