(x² + y2)(x2 – y2)​

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(x² + y2)(x2 – y2)​

Penjelasan dengan langkah-langkah:

(x² + y²)(x² – y²)

x².x² – x².y² + y².x² – y².y²

x⁴ – xy⁴ + yx⁴ – y⁴

x⁴ – y⁴ – xy⁴ + yx⁴

x⁴ – y⁴