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

Toán Lớp 8: Rút gọn phân thức: x³+2x²+4x/x²-4

Toán Lớp 8: Rút gọn phân thức: x³+2x²+4x/x²-4

Comments ( 1 )

  1. Đề sai, sửa thành
    \frac {x^3 + 4x^2 + 4x} {x^2 – 4}
    = \frac{x( x^2 + 4x + 4)}{(x-2)(x+2)} 
    = \frac{x ( x – 2)^2}{(x-2)(x+2)}
    = \frac{x(x-2)}{x+2}

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