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

Toán Lớp 8: Thực hiện phép tính (5x-1)(x+3)-(x-2)(5x-4)

Toán Lớp 8: Thực hiện phép tính
(5x-1)(x+3)-(x-2)(5x-4)

Comments ( 2 )

  1. ~ Bạn tham khảo ~
    (5x-1)(x+3)-(x-2)(5x-4)
    = 5x^2+15x-x-3-5x^2+4x+10x-8
    = (5x^2-5x^2)+(15x-x+4x+10x)-(3+8)
    = 28x-11

  2. $(5x-1)(x+3)-(x-2)(5x-4)$
    $=5x^2+15x-1x-3-5x^2+4x+10x-8$
    $=28x-11$
    @Nobitao@

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

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