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

Toán Lớp 8: Rút gọn A= (2x-3) (x+4)+(-x+1) (x-2)

Toán Lớp 8: Rút gọn
A= (2x-3) (x+4)+(-x+1) (x-2)

Comments ( 2 )

  1. A = (2x – 3)(x + 4) + (-x + 1)(x – 2)
    A = 2x^2 + 8x – 3x – 12 – x^2 + 2x + x  – 2
    A = (2x^2 – x^2) + (8x + 2x – 3x + x) + (-12 – 2)
    A = x^2 + 8x – 14
       
     

  2. $A= (2x-3) (x+4)+(-x+1) (x-2)$
    $A= 2x^2+8x-3x-12+(-x^2)+2x+x-2$
    $A= x^2+8x-14$
    $chucbanhoktot$
     

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

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