Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: Tính nhanh: 999^3+3999^2+3999+1 Mn giải nhanh giúp mình nhé!!!

Toán Lớp 8: Tính nhanh: 999^3+3999^2+3999+1
Mn giải nhanh giúp mình nhé!!!

Comments ( 2 )

  1. text{áp dụng hđt}   A^3+3A^2B8+3AB^2+B^3=(A+B)^3
    =>999^3 + 3.999^2 + 3.999 + 1
    =(999+1)^3
    =1000^3
    =1000000000
     

  2. $\text{999³+3999²+3999+1}$
    = $\text{999³+3999×( 3999+1)}$
    = $\text{998001+3999×4000}$
    = $\text{998001+15996000}$
    = $\text{1012999000}$
    Hay nhất !!^^
     

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Kim Dung