题目内容
给出三个多项式:
x2+x-1,
x2+3x+1,
x2-x,请你任选其中两个进行减法运算.
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答案不唯一,
如(
x2+x-1)-(
x2+3x+1)
=
x2+x-1-
x2-3x-1
=-2x-2.
又如(
x2+x-1)-(
x2-x)
=
x2+x-1-
x2+x
=2x-1.
如(
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=
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=-2x-2.
又如(
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=
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=2x-1.
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