问题
解答题
已知
|
答案
•(a-2b)5a-2b a2-4b2
=
•(a-2b)5a-2b (a+2b)(a-2b)
=
,5a-2b a+2b
∵
=a 2
≠0,∴a=b 3
b,2 3
∴原式=
=
b-2b10 3
b+2b2 3
=10b-6b 2b+6b
=4b 8b
.1 2
已知
|
•(a-2b)5a-2b a2-4b2
=
•(a-2b)5a-2b (a+2b)(a-2b)
=
,5a-2b a+2b
∵
=a 2
≠0,∴a=b 3
b,2 3
∴原式=
=
b-2b10 3
b+2b2 3
=10b-6b 2b+6b
=4b 8b
.1 2