2)
Factorise the following: a4 – b
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Answer:
(a² + b²)(a + b)(a - b)
Step-by-step explanation:
a⁴ - b⁴
(a²)² - (b²)²
(a² + b²²)(a² - b²)
(a² + b²)(a + b)(a - b)
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