下列各组多项式没有公因式的是( )A.2x-2y与y-xB.x2-xy与xy-x2C.3x+y与x+3yD.5x+10y与-2y-x
题型:单选题难度:简单来源:不详
下列各组多项式没有公因式的是( )A.2x-2y与y-x | B.x2-xy与xy-x2 | C.3x+y与x+3y | D.5x+10y与-2y-x |
|
答案
A、∵2x-2y=2(x-y),y-x=-(x-y),∴两个多项式有公因式x-y; B、∵x2-xy=x(x-y),xy-x2=-x(x-y),∴两个多项式有公因式x(x-y); C、3x+y与x+3y没有公因式; D、∵5x+10y=5(x+2y),-2y-x=-(x+2y),∴两个多项式有公因式x+2y. 故选C. |
举一反三
把多项式-8a2b3c+16a2b2c2-24a3bc3分解因式,应提的公因式是( )A.-8a2bc | B.2a2b2c3 | C.-4abc | D.24a3b3c3 |
|
多项式x2-9,x2+6x+9的公因式是______. |
-3x2y+6xy2-12xy的公因式是______. |
多项式x(x-2)-3(2-x)的公因式是______. |
-3a2m+6am2-12am的公因式是______. |
最新试题
热门考点