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: giúp mình với c, x^2+4/x-2 – 4x/2-x d, x^2+4/x-2+4x/2-x

Toán Lớp 8: giúp mình với
c, x^2+4/x-2 – 4x/2-x
d, x^2+4/x-2+4x/2-x

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    c)
    {x^2 + 4}/{x – 2} – {4x}/{2 – x}
    = {x^2 + 4}/{x – 2} – {4x}/{- (x – 2)}
    = {x^2 + 4}/{x – 2} + {4x}/{x – 2}
    = {x^2 + 4 + 4x}/{x – 2}
    = {x^2 + 4x + 4}/{x – 2}
    d)
    {x^2 + 4}/{x – 2} + {4x}/{2 – x}
    = {x^2 + 4}/{x – 2} + {4x}/{- (x – 2)}
    = {x^2 + 4}/{x – 2} – {4x}/{x – 2}
    = {x^2 + 4 – 4x}/{x – 2}
    = {x^2 – 4x + 4}/{x – 2}
    = {x^2 – 2.x.2 + 2^2}/{x – 2}
    = {(x -2)^2}/{x – 2}
    = x – 2
    #SunHee

  2. $\text{ @HV }$
    c)
    $\dfrac{x^2 + 4}{x – 2}$ – $\dfrac{4x}{2 – x}$
    = $\dfrac{x^2 + 4}{x – 2}$ – $\dfrac{-4x}{x- 2}$
    = $\dfrac{x^2 + 4 + 4x}{x – 2}$
    = $\dfrac{(x + 2)^2}{x – 2}$
    d)
    $\dfrac{x^2 + 4}{x – 2}$ + $\dfrac{4x}{2 – x}$
    = $\dfrac{x^2 + 4}{x – 2}$ + $\dfrac{-4x}{x- 2}$
    = $\dfrac{x^2 + 4 – 4x}{x – 2}$
    = $\dfrac{(x – 2)^2}{x – 2}$
    = $\text{ x – 2 }$
     

Leave a reply

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

About Kim Dung