Question

simplify this (m+n)^3+(m-n)^3
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Answer 1

Answer:

2m^3+6mn^2

Step-by-step explanation:

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Answer 2

Answer:

2m(m²+3n²)

Step-by-step explanation:

(m+n)³+(m-n)³

=[m³+n³+3mn(m+n)]+[m³-n³-3mn(m-n)]

=m³+n³+3m²n+3mn²+m³-n³-3m²n+3mn²

=2m³+6mn²=2m(m²+3n²)