Question

Simplify (2k)³+ (2k + 1 )³ ​

Answer 1

6k + 6k + 3 = 0

12k + 3 = 0

12k = - 3

k = -3/12 = - 1 / 4....

Answer 2

Answer:

${(2k)}^{3} + {(2k + 1)}^{3}$

$8 {k}^{3} + 8 {k}^{3} + 1 = 0$

$16 {k}^{3} + 1 = 0$

$16 {k}^{3} = - 1$

k^3 = -1/16

k = root of -1/16

k = -1/2 root2

Ans. -1/2 root 2

Hope it helps.