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: `1, -2x(x-3)-3x(1-5x)=13x^2-x+1/2` `2, 5x(x-3)-3x(x+7)-x(2x-4)-4x+2/3`

Toán Lớp 7: 1, -2x(x-3)-3x(1-5x)=13x^2-x+1/2
2, 5x(x-3)-3x(x+7)-x(2x-4)-4x+2/3

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    1)
    -2x(x-3)-3x(1-5x)=13x^2-x+1/2 
    <=> -2x^2+6x-3x+15x^2-13x^2+x-1/2=0
    <=> (15x^2-13x^2-2x^2)+(6x-3x+x)=1/2
    <=> 4x=1/2
    <=> x=1/8
    Vậy x=1/8

Leave a reply

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

About Nguyệt