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 -5 x³+ 5x² – 25x ) : (x² + 5)

Toán Lớp 8: (x⁴ -5 x³+ 5x² – 25x ) : (x² + 5)

Comments ( 2 )

  1. \((x^4 -5x^3 +5x^2 -25x)÷(x^2 +5)\\= \dfrac{x^4 -5x^3 +5x^2 -25x}{x^2+5}\\= \dfrac{x(x^3 -5x^2 +5x -25)}{x^2 +5}\\= \dfrac{x[x^2(x-5)+5(x-5)]}{x^2+5}\\= \dfrac{x(x-5)(x^2+5)}{x^2+5}\\= x(x-5)=x^2 -5x\)
     

  2. (x^4-5x^3+5x^2-25x):(x^2+5)
    =x(x^3-5x^2+5x-25):(x^2+5)
    =x[x^2(x-5)+5(x-5)]:(x^2+5)
    =x(x-5)(x^2+5):(x^2+5)
    =x(x-5)
    =x^2-5x
     

Leave a reply

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