(1)计算:a2a-b-a-b(2)计算:22+(-12)-2-3-1+19+(π-3.14)0.-数学

题目简介

(1)计算:a2a-b-a-b(2)计算:22+(-12)-2-3-1+19+(π-3.14)0.-数学

题目详情

(1)计算:
a2
a-b
-a-b

(2)计算:22+(-
1
2
)-2-3-1+
1
9
+(π-3.14)0
题型:解答题难度:中档来源:不详

答案

(1)原式=
a2
a-b
-
(a+b)(a-b)
a-b

=
a2-a2+b2
a-b

=
b2
a-b


(2)原式=4+4-class="stub"1
3
+class="stub"1
3
+1
=9.

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