Question

expand (2m-5) raised to 3

Answer 1

Step-by-step explanation:

By (a-b)³ = a³ - b³ - 3ab(a-b)

(2m - 5)³ = (2m)³ - (5)³ - 3(2m)(5)(2m -5).

= 8m³ - 125 -3(20m² - 50m)

= 8m³ - 125 - 60m² +150m

= 8m³ - 60m² +150m - 125

This is your answer........

Answer 2

Answer:

(2m-5)

${(2m - 5)}^{3}$

${(a - b)}^{3} = {a}^{3} - 3 {a}^{2} b + 3a {b}^{2} - {b}^{3}$

${(2m)}^{3} - 3 {(2m)}^{2} (5) + 3(2m) {(5)}^{2} - {(5)}^{3}$

$8 {m}^{3} - 60 {m}^{2} + 150m - 125$