sanguang
幼苗
共回答了20个问题采纳率:85% 举报
x^3 +2x² -3x +4
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x²-2x-1 )x^5 + 0 -8x^3 +8x² -5x +1
x^5 -2x^4 -x^3
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2x^4 -7x^3 +8x²
2x^4 -4x^3 -2x²
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-3x^3+10x²-5x
-3x^3 +6x²+3x
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4x²-8x +1
4x²-8x -4
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5
∴原式=(x²-2x-1)(x³+2x²-3x+4)+5=5
1年前
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