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> 如果2a-b=0,那么a2-b2a2-2ab+b2的值是______.-数学
如果2a-b=0,那么a2-b2a2-2ab+b2的值是______.-数学
题目简介
如果2a-b=0,那么a2-b2a2-2ab+b2的值是______.-数学
题目详情
如果2a-b=0,那么
a
2
-
b
2
a
2
-2ab+
b
2
的值是______.
题型:填空题
难度:中档
来源:不详
答案
∵2a-b=0,
∴b=2a,
∴
a
2
-
b
2
a
2
-2ab+
b
2
=
(a+b)(a-b)
(a-b)
2
=
class="stub"a+b
a-b
=
class="stub"a+2a
a-2a
=-3.
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题目简介
如果2a-b=0,那么a2-b2a2-2ab+b2的值是______.-数学
题目详情
答案
∴b=2a,
∴