(a2+ b2) (- a2+ b2) please solve this question fast
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(a² + b²) (-a² + b²)
Rearranging terms,
= (b² + a²)(b² - a²)
Apply (b + a)(b - a) = b² - a²
= (b²)² - (a²)²
= b⁴ - a⁴
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