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: (8x mũ 3- 4x mũ 2):4x-(4x mũ 2- 5x): 2 x+(2x) mũ 2

Toán Lớp 8: (8x mũ 3- 4x mũ 2):4x-(4x mũ 2- 5x): 2 x+(2x) mũ 2

Comments ( 2 )

  1. Giải đáp:
     (8x^3 – 4x^2) : 4x – (4x^2 – 5x) : 2x + (2x)^2 = 6x^2 – 3x + 5/2
    Lời giải và giải thích chi tiết:
     (8x^3 – 4x^2) : 4x – (4x^2 – 5x) : 2x + (2x)^2
    = (8x^3 : 4x – 4x^2 : 4x) – (4x^2 : 2x – 5x : 2x) + 4x^2
    = (2x^2  – x) – (2x – 5/2) + 4x^2
    = 2x^2 – x – 2x + 5/2 + 4x^2
    = (4x^2 + 2x^2)  – (x+2x)  +5/2
    = 6x^2 – 3x + 5/2

  2. $\frac{8x^3-4x^2}{4x}-\frac{4x^2-5x}{2x}+(2x)^2$
    = $\frac{4x(2x^2-x)}{4x}-\frac{2x(2x-\frac{5}{2})}{2x}+4x^2$
    = $2x^2-x-2x+\frac{5}{2}+4x^2$
    = $6x^2-3x+\frac{5}{2}$
     

Leave a reply

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