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

Toán Lớp 8: A = 5x(4×2 – 2x + 1) – 2x(10×2 – 5x – 2) – 9x + 1

Home/ Toán Lớp 8: A = 5x(4×2 – 2x + 1) – 2x(10×2 – 5x – 2) – 9x + 1

Toán Lớp 8: A = 5x(4×2 – 2x + 1) – 2x(10×2 – 5x – 2) – 9x + 1

Tháng Tư 26, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: A = 5x(4×2 – 2x + 1) – 2x(10×2 – 5x – 2) – 9x + 1

Comments ( 2 )

  1. thudan
    thudan
    26 Tháng Tư, 2022 at 11:30 chiều
    Reply
    A= 5x(4x^2 – 2x+1) – 2x(10x^2 – 5x-2) -9x+1
    A= 20x^3 – 10x^2 + 5x – 20x^3 + 10x^2 + 4x – 9x+1
    A= (20x^3 – 20x^3) – (10x^2 – 10x^2) + (5x + 4x-9x) +1
    A= 1
    Vậy A=1
     

  2. tonhitruc
    tonhitruc
    26 Tháng Tư, 2022 at 11:30 chiều
    Reply
    A=5x(4x^2 – 2x + 1) – 2x(10x^2 – 5x – 2) – 9x + 1
    A=20x^3-10x^2+5x-20x^3+10x^2+4x-9x+1
    A=(20x^3 -20x^3)+(-10x^2 +10x^2)+(5x+4x-9x)+1
    A=0+0+0+1
    A=1
    $@Masonn$

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

An Kim

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