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: Tìm x x^2 + 4x = -4 Không kẻ bảng****

Toán Lớp 8: Tìm x
x^2 + 4x = -4
Không kẻ bảng****

Comments ( 2 )

  1. ⇔x^2 + 4x = -4
    ⇔x^2+ 4x+4=0
    ⇔(x+2)^2=0
    ⇔x+2=0
    ⇔x=0-2=-2
    $Vậy$ x=-2
     

  2. x^2+4x=-4
    ⇔x^2+4x+4=0
    ⇔(x+2)^2=0
    ⇔x+2=0
    ⇔x=-2
    Vậy S={-2}
     

Leave a reply

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

About Bảo Anh