题目内容
计算2x2·(-3x3)的结果是________.
A.
-65-6x5
B.
6x5
C.
-2x6
D.
2x6
计算:
(1)105×106;
(2)a7·a3;
(3)x5·x5;
(4)b5·b.
计算:812n-1·3n-1=________.
(1)a6+(a3)2;
(2)x2·[(x3)2]4;
(3)-(105)3·103.
如图所示,这个长方形可分割为宽为m,长分别为a,b,c的三个小长方形,它们的面积之和为________.所以:________.
计算(一3xy)(一3xy)2结果是
4x2y2
-4x2y2
12x3y3
-12x3y3
填空:
(1)( )·28=216;
(2)( )·53=55;
(3)( )·105=107;
(4)( )·a3=a6.
用科学记数法表示:
8684000000=________;-8080000000=________.
已知当x=1时,2ax2+bx的值为3,则当x=2时,ax2+bx的值为________.