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

Toán Lớp 8: (6xy^2-3x^2y+18xy):3xy (2x+1)(x-2) (x^5-4x) x^2+2x+1-y^2 x^2-5x+6

Home/ Toán Lớp 8: (6xy^2-3x^2y+18xy):3xy (2x+1)(x-2) (x^5-4x) x^2+2x+1-y^2 x^2-5x+6

Toán Lớp 8: (6xy^2-3x^2y+18xy):3xy (2x+1)(x-2) (x^5-4x) x^2+2x+1-y^2 x^2-5x+6

Tháng Ba 23, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: (6xy^2-3x^2y+18xy):3xy
(2x+1)(x-2)
(x^5-4x)
x^2+2x+1-y^2
x^2-5x+6

Comments ( 2 )

  1. minhtamnguyet88
    minhtamnguyet88
    23 Tháng Ba, 2022 at 1:05 sáng
    Reply
    Cho mik gửi nha bn!

    toan-lop-8-6y-2-3-2y-18y-3y-2-1-2-5-4-2-2-1-y-2-2-5-6

  2. maianhnhiquynh
    maianhnhiquynh
    23 Tháng Ba, 2022 at 1:05 sáng
    Reply
    $a)$ $(6xy^2 – 3x^2y + 18xy) : 3xy$
    $ = (6xy^2 : 3xy) + (- 3x^2y : 3xy) + (18xy : 3xy)$
    $= 2y – x + 6$
    $b)$ $(2x + 1)(x – 2)$
    $= (2x.x – 2x.2) + (1.x – 1.2)$
    $= 2x^2 – 4x + x – 2$
    $= 2x^2 – 3x – 2$
    $c)$ $x^5 – 4x$
    $= x(x^4 – 4)$
    $= x(x^4 – 2^2)$
    $= x(x^2 – 2)(x^2 + 2)$
    $d)$ $x^2 + 2x + 1 – y^2$
    $= (x + 1)^2 – y^2$
    $= (x + 1 – y)(x + 1 + y)$
    $e)$ $x^2 – 5x + 6$
    $= x^2 – 2x – 3x + 6$
    $= x(x – 2) – 3(x – 2)$
    $= (x – 2)(x – 3)$

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

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