(3x³+10x²+13x-27)÷(x²+2x-3)

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(3x³+10x²+13x-27)÷(x²+2x-3)

(3x³+10x²+13x-27)÷(x²+2x-3)
(3x³+10x²+13x-27)÷(x²+2x-3)

(3x³+10x²+13x-27)÷(x²+2x-3)
原式=(3x^3+6x^2-9x+4x^2+8x-12+14x-15)/(x^2+2x-3)
=[(x^2+2x-3)(3x+4)+14x-15]/(x^2+2x-3)
=(3x+4)+(14x-15)/(x^2+2x-3)