问题
解答题
计算或化简 (1)(
(2)
|
答案
(1)原式=4×1÷(-3)
=-
;4 3
(2)原式=
-4 (x-2)(x+2) 4 x-2
=
-4 (x-2)(x+2) 4(x+2) (x-2)(x+2)
=-4x-4 (x-2)(x+2)
=-
.4x+4 x2-4
计算或化简 (1)(
(2)
|
(1)原式=4×1÷(-3)
=-
;4 3
(2)原式=
-4 (x-2)(x+2) 4 x-2
=
-4 (x-2)(x+2) 4(x+2) (x-2)(x+2)
=-4x-4 (x-2)(x+2)
=-
.4x+4 x2-4