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> 若ab=2,则a2-ab+b2a2+b2=______.-数学
若ab=2,则a2-ab+b2a2+b2=______.-数学
题目简介
若ab=2,则a2-ab+b2a2+b2=______.-数学
题目详情
若
a
b
=2,则
a
2
-ab+
b
2
a
2
+
b
2
=______.
题型:填空题
难度:中档
来源:不详
答案
∵
class="stub"a
b
=2
,
∴a=2b,
∴
a
2
-ab+
b
2
a
2
+
b
2
=
4b
2
-2
b
2
+
b
2
4
b
2
+
b
2
=
class="stub"3
5
.
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题目简介
若ab=2,则a2-ab+b2a2+b2=______.-数学
题目详情
答案
∴a=2b,
∴