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: Phân tích đa thức thành nhân tử: A) x ² – 3x + xy – 3y B) x ² + 2021x – 2022

Toán Lớp 8: Phân tích đa thức thành nhân tử:
A) x ² – 3x + xy – 3y
B) x ² + 2021x – 2022

Comments ( 2 )

  1. $a,$ $x^2-3x+xy-3y$
    $=x.(x-3)+y.(x-3)$
    $=(x-3).(x+y)$
    $b,$ $x^2+2021x-2022$
    $=x^2-x+2022x-2022$
    $=x.(x-1)+2022(x-1)$
    $=(x-1).(x+2022)$

  2. a, x² – 3x + xy – 3y
    = x(x – 3) + y(x – 3)
    = (x – 3) (x + y)
    b, x² + 2021x – 2022
    = x² + 2022x – x – 2022
    = x(x + 2022) – (x + 2022)
    = (x + 2022)(x – 1)
     

Leave a reply

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

About Mai