Trang chủ » Hỏi đáp » Môn Toán d) (x^3 + x^2 – x + 15) : (x + 3) 25/04/2024 d) (x^3 + x^2 – x + 15) : (x + 3)
d, (x^3 + x^2 – x + 15) : (x + 3) = (x^3 + 3x^2 – 2x^2 – 6x + 5x + 15) : (x +3 ) = [x^2 (x + 3) – 2x(x + 3) + 5(x +3 )] : (x + 3) = (x + 3)(x^2 – 2x + 5) : (x +3 ) = x^2 -2 x + 5 $#duong612009$ Trả lời
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