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

Toán Lớp 8: 3/4x^3y^3:(-1/2x^2y^2) (-xy)^10:(-xy)^5

Toán Lớp 8: 3/4x^3y^3:(-1/2x^2y^2)
(-xy)^10:(-xy)^5

Comments ( 1 )

  1. Giải đáp:
    3/4 x^3 y^3 : (-1/2 x^2 y^2)
    = [3/4 : (-1/2)].(x^3 : x^2).(y^3 : y^2)
    = -3/2 .x^(3 – 2) .y^(3 – 2)
    = -3/2 x^1 y^1
    = -3/2 xy
    (-xy)^10 :(-xy)^5
    = (-xy)^(10 – 5)
    = (-xy)^5

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