B . (y+1)(y﹣3)=﹣(3﹣y)(y+1)
C . 4yz﹣2
z+z=2y(2z﹣yz)+z
D . ﹣8
+8x﹣2=﹣2
)
)
D . (x-1)2=x2-2x+1
B .
C .
D .
B .
C .
D .
B .
C .
D .
B .
C .
D .
⑴
;⑵
;⑶
;⑷
;⑸
+y+
=
)
D . x2+6x+8=x(x+6)+8