simplify: (q²-p²)(q²+p²)-(q²-p²)²
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Step-by-step explanation:
(q⁴- p⁴) - (q⁴+p⁴-2q²p²).
(a-b)(a+b)=a²-b²
(a-b)²=a²+b²-2ab
q⁴- p⁴- q⁴- p⁴+ 2q²p²
2q²p²
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