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

Toán Lớp 8: Rút gọn (x^2+1/3x+1/9)(x-1/3)-(x-1/3)^2

Tháng Tám 10, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: Rút gọn
(x^2+1/3x+1/9)(x-1/3)-(x-1/3)^2

Comments ( 2 )

  1. ngocle44
    ngocle44
    10 Tháng Tám, 2022 at 3:17 sáng
    Reply
    $\\$
    (x^2 + 1/3 x  + 1/9)(x-1/3)-(x-1/3)^2
    = [x^2+1/3 x+(1/3)^2] (x-1/3) – (x^2 – 2/3 x + 1/9)
    = x^3 – (1/3)^3 – x^2 + 2/3x – 1/9
    = x^3 – 1/27 – x^2+ 2/3x – 1/9
    =x^3 – x^2 + 2/3x – 4/27
     

  2. hiennhi98
    hiennhi98
    10 Tháng Tám, 2022 at 3:16 sáng
    Reply

    #helichange
    toan-lop-8-rut-gon-2-1-3-1-9-1-3-1-3-2

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

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