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: Giải phương trình căn x bình – 10x + 25 – 6 =0

Toán Lớp 9: Giải phương trình
căn x bình – 10x + 25 – 6 =0

Comments ( 2 )

  1. $\sqrt{x²-10x+25}$ – 6 =0
    ⇔ $\sqrt{(x-5)²}$=6
    ⇔ |x-5|=6
    ⇔ x-5=±6
    ⇔ x-5=6 hoặc x-5=-6
    ⇔ x = 11 hoặc x = -1
     

  2. $\text{$\sqrt{x²-10x+25}$-6=0}$
    $\text{⇔$\sqrt{(x-5)²}$-6=0}$
    $\text{⇔$\sqrt{(x-5)²}$=6}$
    $\text{⇔lx-5l=6}$
    $\text{⇔\(\left[ \begin{array}{l}x-5=6\\x-5=-6\end{array} \right.\)}$
    $\text{⇔\(\left[ \begin{array}{l}x=11\\x=-1\end{array} \right.\) }$
     

Leave a reply

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

About Thu Giang