factories a⁴+1/a⁴-3
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Step-by-step explanation:
(a²)² + (1/a² )² -2 -1
=(a²)² + (1/a²)² -2*a²*1/a² -1
it's in the form a²-2ab+b² = (a-b)²
=(a² - 1/a²)² -1²
=(a²-1/a² -1)(a² -1/a² +1) x²-y² = (x+y)(x-y)
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