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49 x^4 - 168 x^2 y^2 + 144 y^4

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49x⁴ - 168x²y² + 144y⁴

=(7x²)² - 2(7x²)(12y²) + (12y²)²

=(7x² - 12y²)²

Posted by

Suraj Bhandari

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