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: Bài 1 Nếu x ² = 3 thì x bằng ? Bài 2 a. $\frac{x-1}{y+5}$ = $\frac{6}{7}$

Toán Lớp 7: Bài 1
Nếu x ² = 3 thì x bằng ?
Bài 2
a. $\frac{x-1}{y+5}$ = $\frac{6}{7}$

Comments ( 2 )

  1. Bài 1:
    x^2=3
    =>x=+-\sqrt{3}
    Vậy x=+-\sqrt{3}
    Bài 2:
    (x-1)/(x+5)=6/7
    =>7(x-1)=6(x+5)
    =>7x-7=6x+30
    =>7x-6x=30+7
    =>x=37
    Vậy x=37

  2. \text{Bài 1}
    x^2 = 3
    x^2 = ( ± √3 )^2
    =>\(\left[ \begin{array}{l}x=√3\\x=- √3\end{array} \right.\) 
    \text{Bài 2}
    a, (x-1)/(y+5) = 6/7
    => (x-1).7 = (x+5).6
    => 7x – 7 = 6x + 30
    => 7x – 6x = 30+7
    => x  = 37
     

Leave a reply

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