Question

计算：

(log23)2-4log23+4

+log224=______．

Answer 1

：

(log23)2-4log23+4

+log224
=

(log23-2)2

+log224
=

(log2 4 3 )2

+log224
=log2

4

3

+log224
=log2

4

3

×24
=log₂32=5．
故答案为5．