x2−3xx2−6x+9•x2−11x+30x2−5x−1

问题描述:

x2−3x
x2−6x+9
x2−11x+30
x2−5x
−1

x2−3x
x2−6x+9
x2−11x+30
x2−5x
−1
=
x(x−3)
(x−3)2
(x−5)(x−6)
x(x−5)
-
x−3
x−3

=
3
x−3

故答案为
3
x−3