✨ Best Answer ✨
x^4+2x^3+7x^3-x^2+14x^2+3x^2-7x+6x-3
x^2✖️(x^2+2x-1)+7x✖️(x^2+2x-1)+3(x^2+2x-1)
(x^2+2x-1)✖️(x^2+7x+3)
だと思います！
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