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化简后求值:(a-b)2+b(2a+b),其中a=,b=.
试题详情
化简后求值:(a-b)
2+b(2a+b),其中a=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
,b=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAlCAYAAABLRGl/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAD0SURBVEhL7ZU5FoUgDEWzLgqWY89OqFkILQux
YCn5hEFGRWks/J5j4XBuXp4vEXBwAADePs8Ao/vDd78EsAo5cFS2bhpueWBE/CqrAF/FoFhW8AfE
D/WqiT5EeUKFyem5F6SL0fwC4Gq1kTVf8CBMclooLkxcYbmU5h5QCo/o0Tw4SBHFKcAaU1W0ilcq
poAuxdTOEwUtwAjA9WGq/AjoBy1YVFy43dz+F/QWd/52PKH49tL7f4JXoLX270oGyOQeZDUAcr7s
m3KRrnMprySoKAFkWj9QuZVK6+Yqk4pRC2dLqQLskiEwuQ6gKqRiWUGS+QTwAxpeH5YEEwhjAAAA
AElFTkSuQmCC
)
.
相关试题
-
先化简,再求值:[2(a-b)2-(2a+b)(2a-b)+3a2]÷(a-b),其中a=-3,b=2.
-
下列运算正确的是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFEAAAAjCAYAAADsZeb8AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
B.(2a)2=2a2
C.a2•a3=a6
D.(a-b)(-a-b)=-a2+b2
-
(2010•定海区模拟)下列计算正确的是( )
A.-2(a-b)=-2a+b
B.-2(a-b)=-2a+2b
C.6a-5a=1
D.(a2)3=a5
-
分解因式4a2-b2,结果是( )
A.4(a+b)(a-b)
B.(4a+b)(4a-b)
C.(2a+b)(2a-b)
D.2(a+b)(a-b)
-
(2009•广东一模)分解因式4a2-b2,结果是( )
A.4(a+b)(a-b)
B.(4a+b)(4a-b)
C.(2a+b)(2a-b)
D.2(a+b)(a-b)
-
对a3-2a2b+ab2进行因式分解,正确的是( )
A.a(a2-2ab+b2)
B.a(a-b)2
C.(a-b)(a2-ab)
D.a3-ab(2a-b)
-
(2000•内江)在下列因式分解中,错误的是( )
A.2a3-8a2+12a=2a(a2-4a+6)
B.x2-5x-6=(x-2)(x-3)
C.(a-b)2-c2=(a-b+c)(a-b-c)
D.x2+xy+xz+yz=(x+y)(x+z)
-
(1)计算:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIkAAAAZCAYAAAAFQg2KAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(2)先化简,再求值:(2a-b)2-2a(a-b)-(2a2+b2),其中a=
+1,b=
-1.
-
先化简,再求值:(2a-b)2-2a(a-b)-(2a2+b2),其中a=
+1,b=
-1.
-
(2006•岳阳)先化简,再求值:(2a-b)2-2a(a-b)-(2a2+b2),其中a=
+1,b=
-1.