find the factors - m³ - 1 upon 64m³
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(4m−7n)(16m
2
+28mn+49n
2
)
We have,64m
3
−343n
3
=(4m)
3
−(7n)
3
Using x
3
−y
3
=(x−y)(x
2
+xy+y
2
)
=(4m−7n){(4m)
2
+(4m)(7n)+(7n)
2
}
=(4m−7n)(16m
2
+28mn+49n
2
)
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