(a²-b²) ² ( using suitable identify)
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Answer:
a⁴ + b⁴ - 2(ab)²
Step-by-step explanation:
(a² - b²)²
(a² - b²) × (a² - b²)
a² (a² - b²) - b² (a² - b²)
a⁴ - a²b² - b²a² + b⁴
a⁴ + b⁴ - 2a²b²
a⁴ + b⁴ - 2(ab)²
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