题目内容
化简
-
的结果是______.
x2+5x |
x-1 |
2x2+4x |
x2-x |
原式=
-
=
-
=
=
=
=x+4.
故答案为:x+4.
x2+5x |
x-1 |
x(2x+4) |
x(x-1) |
=
x2+5x |
x-1 |
2x+4 |
x-1 |
=
x2+5x-2x-4 |
x-1 |
=
x2+3x-4 |
x-1 |
=
(x-1)(x+4) |
x-1 |
=x+4.
故答案为:x+4.
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