问题 填空题
计算:
3x
(x-3)2
+
x
x-3
=______.
答案

原式=

3x
(x-3)2
+
x(x-3)
(x-3)2

=

3x+x2-3x
(x-3)2

=

x2
(x-3)2

故答案为:

x2
(x-3)2

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