Question

(5x+1)^3 tính

 

 

Answer 1

giúp tui vs

Answer 2

\(\left(5x+1\right)^3=125x^3+75x^2+15x+1\)

Answer 3

\(\left(5x+1\right)^3=\left(5x\right)^3+3.\left(5x\right)^2.1+3.5x.1^2+1^2=125x^3+75x^2+15x+1\)