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Class 10 > Learn Mathematics > Expand: ?
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Expand: [cube of (2 x + 1)]?

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(2x+1)^3. Formula of (a+b)^3= a^3+b^3+3ab(a+b). So, (2x)^3+1^3+3(2x*1)(2x+1). =8x^3+1+6x(2x+1) =8x^3+1+12x^2+6x =8x^2+12x^2+6x+1.
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