问题
解答题
计算: (1)(
(2)(
(3)
|
答案
(1)(
)-3+42+201201 3
=27+16+1
=44;
(2)(
-2 y3
+3 y2
)•y64 y
=
•y6-2 y3
•y6+3 y2
•y64 y
=2y3-3y4+4y5;
(3)
-(1+m)2 m 1+2m2 m
=1+2m+m2-1-2m2 m
=2m-m2 m
=2-m.
计算: (1)(
(2)(
(3)
|
(1)(
)-3+42+201201 3
=27+16+1
=44;
(2)(
-2 y3
+3 y2
)•y64 y
=
•y6-2 y3
•y6+3 y2
•y64 y
=2y3-3y4+4y5;
(3)
-(1+m)2 m 1+2m2 m
=1+2m+m2-1-2m2 m
=2m-m2 m
=2-m.