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: ( 2x – 1) ( 2x + 1) – x (1 -4 x)

Toán Lớp 8: ( 2x – 1) ( 2x + 1) – x (1 -4 x)

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    (2x-1)(2x+1)-x(1-4x)
    =(2x)²-1²-x+4x²
    =4x²-1-x+4x²
    =8x²-x-1
       Chúc bn hc tốt????
            $\text{#LinhSad}$

  2. ( 2x – 1)( 2x + 1) – x(1 -4 x)
    = 4x^2 + 2x – 2x – 1 – x(-4x + 1)
    = 4x^2 – 1 – (-4x^2 + x)
    = 4x^2 – 1 + 4x^2 – x
    = (4x^2 + 4x^2) – 1 – x
    = 8x^2 – 1 -x

Leave a reply

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