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题目
题型:填空题难度:一般来源:不详
计算化简:
6y
x2-y2
-
2
y-x
+
3
x+y
=______.
答案
原式=
6y
(x+y)(x-y)
+
2
x-y
+
3
x+y

=
6y
(x+y)(x-y)
+
2(x+y)
(x+y)(x-y)
+
3(x-y)
(x+y)(x-y)

=
6y+2x+2y+3x-3y
(x+y)(x-y)

=
6y
(x+y)(x-y)
+
2(x+y)
(x+y)(x-y)
+
3(x-y)
(x+y)(x-y)

=
5(x+y)
(x+y)(x-y)

=
5
x-y

故答案为
5
x-y
核心考点
试题【计算化简:6yx2-y2-2y-x+3x+y=______.】;主要考察你对分式的加减运算等知识点的理解。[详细]
举一反三
x2+2xy+y2
x2y+xy2
-
x2-2xy+y2
x2y-xy2
题型:解答题难度:一般| 查看答案
3x+4
x2+x-6
=
A
x-2
+
B
x+3
,求A、B的值.
题型:解答题难度:一般| 查看答案
计算
1
2x2+3x-1
-
2
2x2+3x+1
+
1
2x2+3x+3
题型:解答题难度:一般| 查看答案
计算:
m2
m-3
-
m-3=______.
题型:填空题难度:简单| 查看答案
化简
2x-y-z
x2-xy-xz+yz
+
2y-x-z
y2-xy-yz+xz
+
2z-x-y
z2-xz-yz+xy
题型:解答题难度:一般| 查看答案
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