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计算:(1)计算:;.(2)先化简再计算:-2x+y,其中x=3,y=2.
试题详情
计算:
(1)计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHcAAAAZCAYAAAALx7GgAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
;.
(2)先化简再计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACEAAAAqCAYAAAA9IzKsAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
-2x+y,其中x=3,y=2.
相关试题
-
下列多项式乘法计算题中,不能用平方差公式计算的是( )
A.(2x-3y)(2x+3y)
B.(2x-3y)(-2x+3y)
C.(2x-3y)(-2x-3y)
D.(-2x+3y)(2x+3y)
-
(1)计算:2sin60°-
+(
)-1+(-1)2010;
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:2x2-3x-1=0
-
(1)计算:2sin60°-
+(
)-1+(-1)2010;
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:2x2-3x-1=0
-
(1)计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAF4AAAAZCAYAAAC4j5m6AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(2)计算:![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPvVPBDYQwDMtk2SnrdJmMklEMobQk
7ak96dAh8SiY2LENYXPRSwAVEFG9ucDCWIIVsOj9SCEO6meATDV9YYXTlFmk08UJ4xYqhPAeeULS
Uz8NAENhQZPbJneACqPE/W7EBXDlkRen0HYmF9VNambRQ/VWFotI9xSzwEf0YNRnnj3Fd5XzkJpJ
ydIrrLNFvWa1UTlus9SodR+GNqU1e2izhrDHLZZDMSYffm2193JcM/52gwd/DWsR6QE4xeDwtHXW
SwAAAABJRU5ErkJggg==
)
+6
-2X![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABMAAAAlCAYAAACgc9J8AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAD8SURBVEhL7VZLDoQgDO25WHAc9tyENQdhy0Fc
cJQOBUF0SgYNCyehiQGrPF//AjICAPjo6oFx+l86WGC8i4JFCRJt+H58z2de71GeAZbIeNRTmC0w
8sC9aL7XZylhj46i/TlxH5jZ7x0LLPtmtH0/zLMVgD+eTqXvS4t5hlDbjvVZ7w/bBsspoJU0RAhI
RzheBsEQg5UxgftA95KW2g9jWssR0Km9ZFTVUwldxUdmveFb3gXnXNobASjMVuuxBSMTqRF6DWmN
m7xe5KCQGGZ2LTPay/IvUCLLIdG5FlzFg8SOM7MTwJP6BLYZgSDMHDD6DLGbwqxGhYnmiJkf7WnQ
NyMuhzkAAAAASUVORK5CYII=
)
(3)计算![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAJ0AAAAkCAYAAACT4zhrAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(4)解方程:2x2-7x+6=0
-
(1)计算:(-1)2÷
+(7-3)×
-(
);
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:x2-6x+1=0.
-
(1)计算:(-1)2÷
+(7-3)×
-(
);
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:x2-6x+1=0.
-
(1)计算:(-1)2÷
+(7-3)×
-(
);
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:x2-6x+1=0.
-
(1)计算:(-1)2÷
+(7-3)×
-(
);
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:x2-6x+1=0.
-
(1)计算:(-1)2÷
+(7-3)×
-(
);
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:x2-6x+1=0.
-
(1)计算:(-1)2÷
+(7-3)×
-(
);
(2)计算:[(2x-y)(2x+y)+y(y-6x)]÷2x;
(3)解方程:x2-6x+1=0.