问题
解答题
计算:(
|
答案
解法一:原式=[(
-5
)(3
+5
)]2…(2分)3
=[(
)2-(5
)2]2=(5-3)2=4.…(2分)3
解法二:原式=(5-2
+3)(5+215
+3)…(2分)15
=(8-2
)(8+215
)=64-60=4.…(2分)15
计算:(
|
解法一:原式=[(
-5
)(3
+5
)]2…(2分)3
=[(
)2-(5
)2]2=(5-3)2=4.…(2分)3
解法二:原式=(5-2
+3)(5+215
+3)…(2分)15
=(8-2
)(8+215
)=64-60=4.…(2分)15