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

Toán Lớp 8: Rút gọn đa thức B=x²(x+2)-(x-2)×(x²+2x+4)

Toán Lớp 8: Rút gọn đa thức
B=x²(x+2)-(x-2)×(x²+2x+4)

Comments ( 2 )

  1. B=x^2(x+2)-(x-2)(x^2+2x+4)
    B=x^3+2x^2-x^3+8
    B=(x^3-x^3)+2x^2+8
    B=2x^2+8
     

  2. $B=x²(x+2)-(x-2)×(x²+2x+4)$
    $B=x²(x+2)-(x³-8)$
    $B=x³+2x²-x³+8$
    $B=2x²+8$
    $B=2(x²+4)$
     

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

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