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

Toán Lớp 8: B1 tính: a,-6x/2x-3 + 2x+6/2x-3

Toán Lớp 8: B1 tính:
a,-6x/2x-3 + 2x+6/2x-3

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     (-6x)/(2x-3) + (2x+6)/(2x-3)
    = (-6x + 2x+6)/(2x-3)
    = (-4x+6)/(2x-3)
    = (6-4x)/(-(3-2x))
    =-(2(3-2x))/(3-2x)
    = -2

  2. Answer
    {-6x}/{2x – 3} + {2x + 6}/{2x – 3}
    = {(-6x) + (2x + 6)}/{2x – 3}
    = {-6x + 2x + 6}/{2x – 3}
    = {-4x + 6}/{2x – 3}
    = {-4x + 6}/{2x – 3}
    = {-2 . (2x – 3)}/{2x – 3}
    = -2

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

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