Quantcast XP Math - Forums - View Single Post - could someone help me with this assignment in Algebra?
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Old 07-25-2007   #5
handsomeboy1702
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(x + 2y + 2z)^2 = x^2 + 4y^2 + 4z^2 + 4xy + 4xz + 8yz(2x + 3y - 4z + 3w)^2 = 4x^2 + 9y^2 + 16z^2 + 9w^2 + 12xy - 16xz + 12xw - 24yz +18yx - 24zw(x^2 - 2x + 3)^2 = x^4 + 4x^2 + 9 - 4x^3 + 6x^2 - 12x = x^4 - 4x^3 + 10x^2 - 12x + 9(2x + 3yz + w)^2 = 4x^2 + 9y^2z^2 + w^2 + 12xyz + 4xw + 6yzw(x + y - 3z)^2 = x^2 + y^2 + 9z^2 + 2xy -6xz - 6yz(x + y)^4 = x^4 + 4x^3y + 6x^2y^2 + 4xy^3 + y^4