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Which is a factor of 3x2y2 + 6x2 + 12y2 + 24?

User TouDick
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3x^2y^2+6x^2+12y^2+24\\\\ 3 * x^2y^2+3 * 2x^2 + 3 * 4y^2 + 3 * 8\\\\ =3(x^2y^2+2x^2+4y^2+8)
User Apokryfos
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