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-x 2 y 2 + x 4 + 4y 2 - 4x 2
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5 votes
-x 2 y 2 + x 4 + 4y 2 - 4x 2

User Kanini
by
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1 Answer

7 votes
-x^2+y^2+x^4+4y^2-4x^2
group like terms
x^4-4x^2-x^2+y^2+4y^2
x⁴-5x²+5y²
User Roman Pustylnikov
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8.0k points
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