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

Toán Lớp 8: Bài 5: Thực hiện phép tính: a) (x + 1)(x + 2) b) (x^3 + x^2 – 3x + 9) : (x + 3)

Toán Lớp 8: Bài 5: Thực hiện phép tính: a) (x + 1)(x + 2) b) (x^3 + x^2 – 3x + 9) : (x + 3)

Comments ( 2 )

  1. Mong cho lời giải hay nhất ❤️⭐️
    toan-lop-8-bai-5-thuc-hien-phep-tinh-a-1-2-b-3-2-3-9-3

  2. a) (x+1)(x+2)
    =x^2+2x+x+2
    =x^2+3x+2
    b)(x^3+x^2-3x+9):(x+3)
    =\frac{x^3+x^2-3x+9}{x+3}
    =\frac{(x^2-2x+3)(x+3)}{x+3}
    =x^2-2x+3

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