问题
解答题
(1)计算:|-2|+
(2)化简:
|
答案
(1)原式=2+2
-4×2
-12 2
=2+2
-22
-12
=1;
(2)原式=
÷(b (a-b)(a+b)
-a+b a+b
)a a+b
=
÷b (a-b)(a+b) a+b-a a+b
=
•b (a-b)(a+b) a+b b
=
.1 a-b
(1)计算:|-2|+
(2)化简:
|
(1)原式=2+2
-4×2
-12 2
=2+2
-22
-12
=1;
(2)原式=
÷(b (a-b)(a+b)
-a+b a+b
)a a+b
=
÷b (a-b)(a+b) a+b-a a+b
=
•b (a-b)(a+b) a+b b
=
.1 a-b