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: rút gọn (x-2)(5-x)+x(x-3) (1+2x)^2-4x(x-3)

Toán Lớp 8: rút gọn
(x-2)(5-x)+x(x-3)
(1+2x)^2-4x(x-3)

Comments ( 2 )

  1. (x-2)(5-x)+x(x+3)
    =5x-x^2-10+2x+x^2+3x
    =10x-10
    (1+2x)^2-4x(x-3)
    =1+4x+4x^2-4x^2+12x
    =16x+1.

  2. Giải đáp + Lời giải và giải thích chi tiết:
    a) (x-2) (5-x) + x (x-3)
    = 5x – x^2 – 10 + 2x + x (x-3)
    = 7x – x^2 – 10 + x^2 + 3x
    = 10x – 10
    b) (1+2x)^2 – 4x (x-3)
    = 1 + 4x + 4x^2 – 4x^2 + 12x
    = 1 + 16x
     

Leave a reply

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

About Phi Nhung