x2−3xx2−6x+9•x2−11x+30x2−5x−1
问题描述:
•
x2−3x
x2−6x+9
−1
x2−11x+30
x2−5x
答
•
x2−3x
x2−6x+9
−1
x2−11x+30
x2−5x
=
•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