问题
解答题
计算或化简: (1)
(2)
(3)
(4)7a
|
答案
(1)
×15
=5 3 15× 5 3
=
=5;25
(2)
=x3+x2y x2(x+y)
=x
;x+y
(3)原式=
×324
=183
.2
(4)原式=14a
-2a a 2
+7a2a
;2a
=41a 2
.2a
计算或化简: (1)
(2)
(3)
(4)7a
|
(1)
×15
=5 3 15× 5 3
=
=5;25
(2)
=x3+x2y x2(x+y)
=x
;x+y
(3)原式=
×324
=183
.2
(4)原式=14a
-2a a 2
+7a2a
;2a
=41a 2
.2a