Question

(3.).(2m-5)³=? please answer this question fast​

Answer 1

Answer:

8m^3-125

Step-by-step explanation:

hope it will help you

Answer 2

$3m \times (2m - 5)^{3} \\ \\ (a-b)³=a³-b³-3ab(a-b)\\\\ = 3m \huge( \small {(2m)}^{3} - {5}^{3} - 3 \times 2m \times 5(2m - 5) \huge) \\ \\ = 3m \huge{(} \small8 {m}^{3} - 125 - -30m(2m - 5) \huge) \\ \\ = 3m \huge{(} \small8 {m}^{3} - 125 -60 {m}^{2} + 150m \\ \\ = 24 {m}^{4} - 375m - 180 {m}^{3} + 450 {m}^{2} \\ \\ = 24 {m}^{4} - 180 {m}^{3} + 450 {m}^{2} - 375m$