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> 化简下列各题.(1)m2-2m4-m2;(2)x-yx2-2xy+y2;(3)ba-b+aa+b-2abb2-a2;(4)(1b-1a)•aba2-b2.-数学
化简下列各题.(1)m2-2m4-m2;(2)x-yx2-2xy+y2;(3)ba-b+aa+b-2abb2-a2;(4)(1b-1a)•aba2-b2.-数学
题目简介
化简下列各题.(1)m2-2m4-m2;(2)x-yx2-2xy+y2;(3)ba-b+aa+b-2abb2-a2;(4)(1b-1a)•aba2-b2.-数学
题目详情
化简下列各题.
(1)
m
2
-2m
4-
m
2
;
(2)
x-y
x
2
-2xy+
y
2
;
(3)
b
a-b
+
a
a+b
-
2ab
b
2
-
a
2
;
(4)
(
1
b
-
1
a
)•
ab
a
2
-
b
2
.
题型:解答题
难度:中档
来源:不详
答案
(1)原式=
m(m-2)
-(m+2)(m-2)
=-
class="stub"m
m+2
;
(2)原式=
class="stub"x-y
(x-y
)
2
=
class="stub"1
x-y
;
(3)原式=
b(a+b)+a(a-b)+2ab
(a+b)(a-b)
=
(a+b
)
2
(a+b)(a-b)
=
class="stub"a+b
a-b
;
(4)原式=
class="stub"a-b
ab
•
class="stub"ab
(a+b)(a-b)
=
class="stub"1
a+b
.
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题目简介
化简下列各题.(1)m2-2m4-m2;(2)x-yx2-2xy+y2;(3)ba-b+aa+b-2abb2-a2;(4)(1b-1a)•aba2-b2.-数学
题目详情
(1)
(2)
(3)
(4)(
答案
=-
(2)原式=
=
(3)原式=
=
=
(4)原式=
=