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

Toán Lớp 8: d) x2 + 4x e) x3 – 2×2 + 5x – 10

Toán Lớp 8: d) x2 + 4x e) x3 – 2×2 + 5x – 10

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    d) x^2 + 4x
    =x.x +4x
    =x(x+4)
    e)x^3 -2x^2 +5x -10
    =x^2 .x -2.x^2 +5x -2.5
    =x^2 .(x-2) +5(x-2)
    =(x^2 +5)(x-2)

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