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 9: rút gọn các biểu thức √x^2(x-2)^2 (x<0)

Toán Lớp 9: rút gọn các biểu thức
√x^2(x-2)^2 (x<0)

Comments ( 2 )

  1. ${\sqrt[]{x² . ( x – 2 )²}}$ ${với(x<0)}$
    ${= \sqrt[]{[x . ( x – 2 )]²}}$
    ${= \sqrt[]{( x² – 2x )²}}$
    ${= | x² – 2x |}$
    ${= x² – 2x }$

  2. \sqrt{x^2(x-2)^2}
    =\sqrt{x^2}.\sqrt{(x-2)^2}
    =|x|.|x-2|
    =(-x).(2-x) (x<0)
    =-2x+x^2
     

Leave a reply

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

About Khanh