Question

write the expended form (2x+1)³​

Answer 1

${(2x + 1)}^{3} \\ \\ = {(2x)}^{3} + {(1)}^{3} \\ \\ = {8x}^{3 } + 1$

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Answer 2

(2x+1)³

= (2x)³+(1)³+3(2x)²(1)+3(2x)(1)²

=8x³+1+12x²+6x

= 8x³+12x²+6x+1

Remember:

(a+b)³= a³+b³+3a²b+3ab²