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

Toán Lớp 8: (-5x)^2 y^2 ×1/5xy giúp em vs mng

Toán Lớp 8: (-5x)^2 y^2 ×1/5xy giúp em vs mng

Comments ( 2 )

  1. (-5x)^{2}y^{2} . 1/5xy
    = 25x^{2}y^{2} . 1/5xy
    = 5x^{3}y^{3}
     

  2. (-5x)^2 y^2 × 1/5 xy
    = 25x^2y^2 × 1/5 xy
    = 5 x^3 y^3 = 5 (xy)^3
     

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

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