题目内容
化简下列各式.(1)(
+
)+(
+
);
(2)(
-
)+(
-
).
解析:(1)(
+
)+(
+
)
=(
+
)+(
+
)
=
+![]()
=
.
(2)(
-
)+(
-
)
=(
-
)+(
-
)
=
+(
+
)
=
+![]()
=0.
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题目内容
化简下列各式.(1)(
+
)+(
+
);
(2)(
-
)+(
-
).
解析:(1)(
+
)+(
+
)
=(
+
)+(
+
)
=
+![]()
=
.
(2)(
-
)+(
-
)
=(
-
)+(
-
)
=
+(
+
)
=
+![]()
=0.