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 , bt: (1-2x)(3x+1)+3x(2x-1)=9 ĐS : x=-4

Toán Lớp 8: Tìm x , bt: (1-2x)(3x+1)+3x(2x-1)=9 ĐS : x=-4

Comments ( 2 )

  1. ~ Bạn tham khảo ~
    (1-2x)(3x+1)+3x(2x-1)=9
    <=> (1-2x)(3x+1)-3x(1-2x)=9
    <=> (1-2x)(3x+1-3x)=9
    <=> 1-2x=9
    <=> 1-9=2x
    <=> 2x=-8
    <=> x=-4
    Vậy x=-4

  2. (1-2x)(3x+1)+3x(2x-1)=9
    <=>(1-2x)(3x+1)-3x(1-2x)=9
    <=>(1-2x)(3x+1-3x)=9
    <=>1-2x=9
    <=>-2x=8
    =>x=-4
    Vậy phương trình có nghiệm x=-4
    @K

Leave a reply

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