问题
解答题
计算: ①(
②(5
|
答案
①(
-1)2+(3
+2)2-2(3
-1)(3
+1)3
=3-2
+1+3+43
+4-6+23
=2
+7;3
②(5
-648
+427
)÷15 3
=(20
-183
+43
)÷15 3
=(2
+43
)÷15 3
=2+4
.5
计算: ①(
②(5
|
①(
-1)2+(3
+2)2-2(3
-1)(3
+1)3
=3-2
+1+3+43
+4-6+23
=2
+7;3
②(5
-648
+427
)÷15 3
=(20
-183
+43
)÷15 3
=(2
+43
)÷15 3
=2+4
.5