Question

(2x-1)^3 expand this question ​

Answer 1

Answer:

ANS-

Step-by-step explanation:

(2X-1)^3=

Use the Binomial Theorem.

Using identity

(a + b)³ = a³+ b³+ 3ab(a + b)

(2x + 1)³

= (2x)³ + 1³ + (3×2x×1)(2x + 1)

= 8x³+ 1 + 6x(2x + 1)

= 8x³ + 1 + 12x² + 6x

Answer 2

Answer:

$({2x - 1})^{3} = ( {2x})^{3} - {1}^{3} - 6x(2x - 1) \\ \\ = 8 {x}^{3} - 1 - 12 {x}^{2} + 6x$