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

Toán Lớp 8: 6x(2x – 7) – (3x – 5)(4x + 7) rút gọn

Home/ Toán Lớp 8: 6x(2x – 7) – (3x – 5)(4x + 7) rút gọn

Toán Lớp 8: 6x(2x – 7) – (3x – 5)(4x + 7) rút gọn

Tháng Mười Hai 25, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: 6x(2x – 7) – (3x – 5)(4x + 7) rút gọn

Comments ( 2 )

  1. ngocle44
    ngocle44
    25 Tháng Mười Hai, 2022 at 4:17 chiều
    Reply
    $\text{6x.(2x-7)-(3x-5).(4x+7)}$
    $\text{=12}$$x^{2}-42x-(12$ $x^{2}+21x-20x-35)$
    $\text{=12}$$x^{2}-42x-12$ $x^{2}-x+35$
    $\text{=(12}$$x^{2}-12$ $x^{2})+(-42x-x)+35$
    $\text{=-43x+35}$
    $\text{#mct}$

  2. thucquyenlan
    thucquyenlan
    25 Tháng Mười Hai, 2022 at 4:17 chiều
    Reply
      $6x(2x – 7) – (3x – 5)(4x + 7)$
    $=12x^2-42x-(12x^2+21x-20x-35)$
    $=12x^2-42x-12x^2-21x+20x+35$
    $=-43x+35$
     

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

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