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: (x4-31×2+9):(x2+5x-3) Mn giup em vs a

Toán Lớp 8: (x4-31×2+9):(x2+5x-3)
Mn giup em vs a

Comments ( 2 )

  1. Gửi bạn:
    $x^4-31x^2+9$
    $=x^4+5x^3-3x^2-5x^3-25x^2+15x-3x^2-15x+9$
    $=x^2(x^2+5x-3)-5x(x^2+5x-3)-3(x^2+5x-3)$
    $=(x^2+5x-3)(x^2-5x-3)$
    $⇒(x^2+5x-3)(x^2-5x-3):(x^2+5x-3)$
    $=x^2-5x-3$
    Vậy $(x^4-31x^2+9):(x^2+5x-3)=x^2-5x-3$

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-8-4-312-9-2-5-3-mn-giup-em-vs-a

Leave a reply

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

About Thúy Mai