expand (7+m)^3
i need now
and ha clear solving
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Step-by-step explanation:
using the identity (a+b)³=a³+3a²b+3ab²+b³ -
(7+m)³
= 7³ + 3.7².m + 3.7.m² + m³
= 343 + 147m + 21m² + m³
hope it'll help you
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