Question

write (2x + 1)³ in expanded form​

Answer 1

Answer:

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Answer 2

Answer:

using (a+b)³ =a ³+ b ³ + 3 ab (a+b)

where a=2x,

b = 1

(2x)³ + (1)³ + 3 (2x) (1) (2x+1)

8x³ +1 +6x (2x+1)

8x ³ +1+ 12x ² +6x +1

hence proved !!