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: Bài 1 a. -2x (-3x +2) – (x+2)^2 b. (x -3) (x +8) – x (x -12) Bài 2 2x^2 + 5x^3 + x^2 y giúp mình với ạ

Toán Lớp 8: Bài 1
a. -2x (-3x +2) – (x+2)^2
b. (x -3) (x +8) – x (x -12)
Bài 2
2x^2 + 5x^3 + x^2 y
giúp mình với ạ

Comments ( 2 )

  1. Bài 1:
    a) -2x(-3x+2)-(x+2)^2
    =6x^2-4x-x^2-4x-4
    =5x^2-8x-4
    b) (x-3)(x+8)-x(x-12)
    =x^2+8x-3x-24-x^2+12x
    =17x-24
    Bài 2:
    2x^2+5x^3+x^2y
    =x^2(2+5x+y)
     

  2. y10000
    $\text{Bài 1 :}$
    a ) 
    -2x(-3x+2)-(x+2)²
    = 6x² – 4x – x² -4x -4
    = 5x² – 8x -4
    b ) 
    ( x -3)(x+8)-x(x-12)
    = x² +8x-3x-24-x²+12x
    = 17x-24
    $\text{Bài 2 :}$
    2x²+5x³+x²y
    = x².(2+5x+y)

Leave a reply

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