问题
解答题
计算: (1)
(2)
(3)
(4)(2-
|
答案
(1)原式=a2-9 a+3
=(a+3)(a-3) a+3
=a-3;
(2)原式=
•2(a-2) (a+3)2
•(a+3)a+3 a-2
=2;
(3)原式=3
+3
-3 3 2
=
-10 3 3
;2
(4)原式=4-2
+3-(4-3)+2-3 3
=4-2
+3-1+2-3 3
=8-3
.3
计算: (1)
(2)
(3)
(4)(2-
|
(1)原式=a2-9 a+3
=(a+3)(a-3) a+3
=a-3;
(2)原式=
•2(a-2) (a+3)2
•(a+3)a+3 a-2
=2;
(3)原式=3
+3
-3 3 2
=
-10 3 3
;2
(4)原式=4-2
+3-(4-3)+2-3 3
=4-2
+3-1+2-3 3
=8-3
.3