find the value of (x+2a)^3
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Using identity (a+b)³ = a³ + b³ +3ab(a+b)
(x+2a)³ = x³ + 8a³ +3*x*2a(x+2a)
=> (x+2a)³ = x³+8a³+6ax²+12a²x
(x+2a)³ = x³ + 8a³ +3*x*2a(x+2a)
=> (x+2a)³ = x³+8a³+6ax²+12a²x
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