作业帮若多项式A减去-3x得到多项式x²-3x+6,则多项式A为[ ]A.x²-6x+6 B.x²+3x+6 C.x²-6x D.x²+6
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![若多项式A减去-3x得到多项式x²-3x+6,则多项式A为[ ]A.x²-6x+6 B.x²+3x+6 C.x²-6x D.x²+6](/uploads/image/z/5342771-11-1.jpg?t=%E8%8B%A5%E5%A4%9A%E9%A1%B9%E5%BC%8FA%E5%87%8F%E5%8E%BB-3x%E5%BE%97%E5%88%B0%E5%A4%9A%E9%A1%B9%E5%BC%8Fx%26%23178%3B-3x%2B6%2C%E5%88%99%E5%A4%9A%E9%A1%B9%E5%BC%8FA%E4%B8%BA%5B+%5DA.x%26%23178%3B-6x%2B6+B.x%26%23178%3B%2B3x%2B6+C.x%26%23178%3B-6x+D.x%26%23178%3B%2B6)
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若多项式A减去-3x得到多项式x²-3x+6,则多项式A为[ ]A.x²-6x+6 B.x²+3x+6 C.x²-6x D.x²+6
若多项式A减去-3x得到多项式x²-3x+6,则多项式A为[ ]
A.x²-6x+6 B.x²+3x+6 C.x²-6x D.x²+6
若多项式A减去-3x得到多项式x²-3x+6,则多项式A为[ ]A.x²-6x+6 B.x²+3x+6 C.x²-6x D.x²+6
A=(x^2 -3x+6)+(-3x)
=x^2 -6x+6
答案选A
选A