Question

Expand the following : (ii) ( 5m – 7 )³ Please do it fast

Answer 1

Answer:

${(5m)}^{3} - {7}^{3} - 3 \times {(5m)}^{2} \times 7 + 3 \times 5m \times {7}^{2}$

${125m}^{3} - 343 - {525m}^{2} + 735m$

Answer 2

Answer:

(5m-7)^3

(5m)^3 - 3(25m^2) (7)+ 3(5m) (49) - (7)^3

(5m)^3 - 3 (5m)^2 (7) + 3(5m) (7)^2

125m^3 - 525m^2 + 735m - 343

Hopefully it will help you !