Thực hiện phép nhân : a, 3x ²(4x ³-2x +1/3) b, 4x ² ( 2x ²-x +5)5x c, (x+3) ×(x-2)+3x

1 bình luận về “Thực hiện phép nhân : a, 3x ²(4x ³-2x +1/3) b, 4x ² ( 2x ²-x +5)5x c, (x+3) ×(x-2)+3x”

1. a) 3x^2 (4x^3 – 2x + 1/3)

   = 12x^5 – 6x^3 + x^2

   —-

   b) 4x^2 (2x^2 – x+5) 5x

   = (8x^4 – 4x^3 + 20x^2) 5x

   = 40x^5 – 20x^4 + 100x^3

   —-

   c) (x+3)(x-2)+3x

   = x^2+3x-2x-6+3x

   = x^2 +4x-6

   ~~Hok tốt~~

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