factorization by converting the given expression into a perfect square
a^4+a^2 b^2+b^4
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Step-by-step explanation:
a⁴ + a²b² + b⁴
a⁴ + 2a²b² + b⁴ - a²b²
( a² + b² )² - a²b²
(a²+b²+ab) (a²+b²-ab)
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