问题
解答题
计算: (1)(4+
(2)(
(3)(
(4)(2
|
答案
(1)(4+
)(4-7
)=16-7=8;7
(2)(
+310
)(2
-310
)=10-18=-8;2
(3)(
+2)2=7+43
;3
(4)(2
-6
)2=24-22
•6
+2=26-22
.3
计算: (1)(4+
(2)(
(3)(
(4)(2
|
(1)(4+
)(4-7
)=16-7=8;7
(2)(
+310
)(2
-310
)=10-18=-8;2
(3)(
+2)2=7+43
;3
(4)(2
-6
)2=24-22
•6
+2=26-22
.3