)2=﹣16a4
C . 3a﹣1=
D . (2
a2﹣
a)2÷3a2=4a2﹣4a+1
B .
C .
D .
B .
C .
D .
B . 4m﹣3m=1
C . 3
+2
=5
D . 7
y﹣4y
=3
y
×
=﹣7
D . ﹣2ba2+a2b=﹣a2b
B .
C .
D .
B .
C .
D .
B .
C .
D .