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 7: tìm x trong tỉ lệ thức: $\frac{6}{x-2}$ = $\frac{x+2}{4}$

Toán Lớp 7: tìm x trong tỉ lệ thức: $\frac{6}{x-2}$ = $\frac{x+2}{4}$

Comments ( 2 )

  1. 6/(x-2)=(x+2)/4
    ⇔6.4=(x-2)(x+2)
    ⇔24=x^2-4
    ⇔x^2-4=24
    ⇔x^2=28
    ⇔x=$\sqrt[]{±28}$ 
     

  2. frac{6}{x – 2} = frac{x + 2}{4}
    => 6 . 4 = (x – 2) . (x + 2)
    => 24 = (x – 2) . (x + 2)
    => 24 = x^2 – 4
    => x^2 = 24 + 4
    => x^2 = 28
    => x = \sqrt{±28}
    Vậy x = \sqrt{±28}

Leave a reply

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

About Mai