Factorize. m^4 - n^4
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(m²)²-(n²)²
Using a²-b²= (a+b)(a-b)
=>(m²+n²) (m²-n²)
=> (m²+n²)(m+n)(m-n)
Using a²-b²= (a+b)(a-b)
=>(m²+n²) (m²-n²)
=> (m²+n²)(m+n)(m-n)
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