Giúp với ;-; Phân tích nha

Question

Giúp với ;-; Phân tích nha
giup-voi-phan-tich-nha

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Huy Gia 4 years 2020-10-14T16:59:24+00:00 2 Answers 105 views 0

Answers ( )

  1. Dulcie
    0
    2020-10-14T17:00:40+00:00
    Reply

    a)x−y+2(x−y)

    =(x−y)+2(x−y

    =(x−y)(1+2)

    =3(x−y)

    b) x+2+x²+2x

    =(x²+x)+(2x+2)

    =x(x+1)+2(x+1)

    =(x+2)(x+1)

     

  2. kiet
    0
    2020-10-14T17:01:01+00:00
    Reply

    a) `x-y+2(x-y)`

    `= (x-y)+2(x-y)`

    `= (x-y)(1+2)`

    `= 3(x-y)`

    b) `x+2+x²+2x`

    `= (x²+x)+(2x+2)`

    `= x(x+1)+2(x+1)`

    `= (x+2)(x+1)`

     

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )