题目内容
x2m+1=xm·________=x2m-2·________=xm+2·________.
xm+1,x3,xm-1
下列计算正确的是
A.2x2·3x2=6x2
B.x3+x3=2x6
C.(x3)m÷x2m=xm
D.(x+y)2=x2+y2
3xm·xm+1-x2m·x-xm-3·xm+4=________.
xm·x2m·x2m+1=________.