OXJk+ 1 (s, t)=sjk (s, t)-tfk-1 (s, t).
補充演練
1. 分解因式:(1) xº-yº.
1
(2)) x² - y² +6yz- 9z².
(1) (x+y)(x²-xy+y²) (x−y) (x² + xy + y²);
(2)(x+y-3z)(x-y+3z).
X
3.化簡下列分式: 4
答:(1)
02-12 x=y)(x44)
(X+1)(x-y)
2. 分解因式: (1) 2x² +54.
(3) aº - 64b6.
答:(1)2(x+3)(x-3x+9);(2)(x-1)(x^²+2x+2);
(3)(a+2b)(a-2b)(a-2ab+4b²)(a+2ab+4b²).
2x+1
2(x-2)(x+3)
隨堂練習解答
2x+²-28 -645² 22(X+311xx
1
2x²+10x+12
;(2)1.
3-(1)
(2)
x+5x+6
x² + 3x
2X +6
x+2
BX+4X=10X
2(x²+√7)
x+2)(x-2) 2(X+3) (X+2)
二八年功
x+2
x
2X(X+3)=2X4
X(X+3)+2 -1^
32
(X+2) (x-2)7
46