(-4a-1)与(4a-1)的积等于[ ]A.16a2-1B.-8a2-1C.-4a2+1D.-16a2+1
题型:单选题难度:简单来源:同步题
(-4a-1)与(4a-1)的积等于 |
[ ] |
A.16a2-1 B.-8a2-1 C.-4a2+1 D.-16a2+1 |
答案
D |
举一反三
(15-7xy)(-15-7xy)=( )2-( )2=( )。 |
(x-y)(x+y)( )=x4-2x2y2+y4,(x+y)2=(x-y)2+( )。 |
(x+1)(x-1)-1=( ),4-9x2=( )( )。 |
( )(a+b+c)=a2-(b+c)2,0.09x2-0.6x+( )=( )2。 |
(x-2y-3)(x+2y-3)=[( )-2y][( )+2y]。 |
最新试题
热门考点