Question

by using standard formula expand the following (2x-1)^3​

Answer 1

Answer:

$8 {x}^{3} - 12 {x}^{2} + 6x - 1$

Step-by-step explanation:

${(2x - 1)}^{3} \: is \: in \: the \: form \: of \: \\ {(a - b)}^{3} = {a}^{3} - {b}^{3} - 3ab(a - b) \\ = > {(2x - 1)}^{3} = {(2x)}^{3} - {(1)}^{3} - 3(2x)(1)(2x - 1) \\ \: \: = {8x}^{3} - 1 - 6x(2x - 1) \\ = {8x}^{3} - 1 - {12}^{2} + 6x \\ = {8x}^{3} - {12}^{2} + 6x - 1$