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> 化简题:(1)2x-64-4x+x2÷(x+3)×x2+x-63-x;(2)-(-a2b)2•(-b2a)3•(1ab)4•(2a3);(3)2+3yx2-3yx-12x+y312x-y3;(4)3-
化简题:(1)2x-64-4x+x2÷(x+3)×x2+x-63-x;(2)-(-a2b)2•(-b2a)3•(1ab)4•(2a3);(3)2+3yx2-3yx-12x+y312x-y3;(4)3-
题目简介
化简题:(1)2x-64-4x+x2÷(x+3)×x2+x-63-x;(2)-(-a2b)2•(-b2a)3•(1ab)4•(2a3);(3)2+3yx2-3yx-12x+y312x-y3;(4)3-
题目详情
化简题:
(1)
2x-6
4-4x+
x
2
÷(x+3)×
x
2
+x-6
3-x
;
(2)
-(-
a
2
b
)
2
•(-
b
2
a
)
3
•(
1
ab
)
4
•(2
a
3
)
;
(3)
2+
3y
x
2-
3y
x
-
1
2
x+
y
3
1
2
x-
y
3
;
(4)
3-x
2x-4
÷(x+2-
5
x-2
)
;
(5)
(
x
2
-1)(
1
x-1
-
1
x+1
-1)
.
题型:解答题
难度:中档
来源:不详
答案
(1)
class="stub"2x-6
4-4x+
x
2
÷(x+3)×
x
2
+x-6
3-x
=
2(x-3)
(x-2
)
2
×
class="stub"1
x+3
×
(x-2)(x+3)
3-x
=-
class="stub"2
x-2
;
(2)
-(-
a
2
b
)
2
•(-
b
2
a
)
3
•(
class="stub"1
ab
)
4
•(2
a
3
)
=
a
4
b
2
•
b
6
a
3
•
class="stub"1
a
4
b
4
•8a3
=8;
(3)
2+
class="stub"3y
x
2-
class="stub"3y
x
-
class="stub"1
2
x+
class="stub"y
3
class="stub"1
2
x-
class="stub"y
3
=
class="stub"2x+3y
2x-3y
-
class="stub"3x+2y
3x-2y
=
(2x+3y)(3x-2y)-(2x-3y)(3x+2y)
(2x-3y)(3x-2y)
=
class="stub"10xy
(2x-3y)(3x-2y)
;
(4)
class="stub"3-x
2x-4
÷(x+2-
class="stub"5
x-2
)
=
class="stub"3-x
2(x-2)
÷
(x+2)(x-2)-5
x-2
=
class="stub"3-x
2(x-2)
×
class="stub"x-2
(x+3)(x-3)
=-
class="stub"1
2(x+3)
;
(5)
(
x
2
-1)(
class="stub"1
x-1
-
class="stub"1
x+1
-1)
=(x+1)(x-1)(
class="stub"1
x-1
-
class="stub"1
x+1
-1)
=x+1-(x-1)-(x+1)(x-1)
=3-x2.
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题目简介
化简题:(1)2x-64-4x+x2÷(x+3)×x2+x-63-x;(2)-(-a2b)2•(-b2a)3•(1ab)4•(2a3);(3)2+3yx2-3yx-12x+y312x-y3;(4)3-
题目详情
(1)
(2)-(-
(3)
(4)
(5)(x2-1)(
答案
=
=-
(2)-(-
=
=8;
(3)
=
=
=
(4)
=
=
=-
(5)(x2-1)(
=(x+1)(x-1)(
=x+1-(x-1)-(x+1)(x-1)
=3-x2.