Question

(m-1)^3

(x+5)^3

(x-5)^3

Answer 1

= (m - 1)³ 
= (m - 1)².(m - 1)
= (m² - 2m + 1).(m - 1)
= m³ - m² - 2m² + 2m + m - 1
= m³ - 3m² + 3m - 1

= (x + 5)³ 
= (x + 5)² . (x + 5)
= (x² + 2.5x + 25).(x + 5)
= (x² + 10x + 25).(x + 5)
= x³ + 5x² + 10x² + 50x + 25x + 125
= x³ + 15x² + 75x + 125

= (x - 5)³ 
= (x - 5)².(x - 5)
= (x² - 2.5x + 25).(x - 5)
= (x² - 10x + 25).(x - 5)
= x³ - 5x² - 10x² + 50x + 25x - 125
= x³ - 15x² + 75x - 125