A.2x2-xy-x=2x(x-y-1) |
B.-xy2+2xy-3y=-y(xy-2x-3) |
C.x(x-y)-y(x-y)=(x-y)2 |
D.x2-x-3=x(x-1)-3 |
A.2 | B.3 | C.-2 | D.-3 |
A.(y-1)(y+1)=y2-1 | B.x2y+xy2-1=xy(x+y)-1 |
C.(x-2)(x-3)=(3-x)(2-x) | D.x2-4x+4=(x-2)2 |
A.(a+3)(a-3)=a2-9 | B.x2+x-5=(x-2)(x+3)+1 | ||
C.a2b+ab2=ab(a+b) | D.x2+1=x(x+
|
© 2017-2019 超级试练试题库,All Rights Reserved.