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

Toán Lớp 8: -2xy+x+2x^2-y 4x^ – (x^ – 2x + 1) Giúp vứiii ạ

Tháng Tám 31, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: -2xy+x+2x^2-y
4x^ – (x^ – 2x + 1)
Giúp vứiii ạ

Comments ( 2 )

  1. minhtuyethue
    minhtuyethue
    31 Tháng Tám, 2022 at 8:52 sáng
    Reply
    -2xy+x+2x^2-y
    =-2xy+2x^2+x-y
    =2x(x-y)+(x-y)
    =(x-y)(2x+1)
    4x^2-(x^2-2x+1)
    =(2x)^2-(x-1)^2
    =(2x-x+1)(2x+x-1)
    =(x+1)(3x-1)
    #tnvt

  2. quynhmaithu
    quynhmaithu
    31 Tháng Tám, 2022 at 8:52 sáng
    Reply
       $-2xy + x + 2x^2 – y^{}$ 
    $= (2x^2-2xy) + (x-y)^{}$ 
    $= 2x(x-y) + (x-y)^{}$ 
    $= (x-y) (2x+1)^{}$ 
       
        $4x^2  –  (x^2 – 2x + 1)^{}$ 
    $=(2x)^2  –  (x-1)^{2}$ 
    $=(2x – x + 1) (2x + x – 1)^{}$ 
    $=(x+1) (3x-1)^{}$ 

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

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