人教版七年级数学下册期末复习知识点大全
一、选择题
1.如图所示,直线a,b被直线c所截,则1与2是()>>>>
A.同位角
A.x3﹣x=x(x2﹣1)
B.内错角C.同旁内角D.对顶角
2.下列分解因式正确的是()B.m2+m﹣6=(m+3)(m﹣2)C.(a+4)(a﹣4)=a2﹣16D.x2+y2=(x+y)(x﹣y)3.>>>>已知A.4A.2,2,4A.a4a3aA.x(xyx2xyC.(x1(x-2(x-2(x1
1
1
,则a2-b2-2b的值为
B.3B.3,4,5B.a4a3a7
C.1C.1,2,3C.(a32a6B.2x22xy2x(xyD>>>>.xx1>>>>