👤

What is the second term of (m - 5n)³ when expanded?
A. 15m²n
B. - 15m²n
C. 125m²n
D. - 125m²n


Sagot :

Answer:

B. - 15m²n

Step-by-step explanation:

(m-5)^3

= m^3 + (3) (m^2)(-5n) + (3) (m) (-5n)^2 + (-5n)^3

Second term = (3) (m^2)(-5n)

(3) (m^2)(-5n)

= - 15m^2 n