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: ` 3x^3 – 12x = 0 ` HELP ME !!!!!!!!!!!!!

Toán Lớp 8: 3x^3 – 12x = 0
HELP ME !!!!!!!!!!!!!

Comments ( 2 )

  1. Giải đáp $*$ Lời giải và giải thích chi tiết:
     3x^3 -12x=0
    <=>3x(x^2 -4)=0
    <=>3x(x^2 -2^2)=0
    <=>3x(x-2)(x+2)=0
    <=>[(3x=0),(x-2=0),(x+2=0):}
    <=>[(x=0),(x=2),(x=-2):}
     Vậy x=0;x =+-2

  2. Bạn tham khảo !
    3x^3-12x=0
    <=>3x(x^2-4)=0
    <=>3x(x^2-2^2)=0
    <=>3x(x-2)(x+2)=0
    <=>[(3x=0),([(x-2=0),(x+2=0):}):}
    <=>[(x=0),([(x=2),(x=-2):}):}
    Vậy x=0;x=2;x=-2
     

Leave a reply

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

About Mai