a^2+b^2-6a+6b-2ab+9 因式分解
网友回答
a^2+b^2-6a+6b-2ab+9
=(a-b)^2-6(a-b)+9
=(a-b-3)^2
======以下答案可供参考======
供参考答案1:
a^2+b^2-6a+6b-2ab+9
=(a²-2ab+b²)-6(a-b)+9
=(a-b)²-6(a-b)+9
=(a-b-3)²
供参考答案2:
a^2+b^2-6a+6b-2ab+9
=a^2-2ab+b^2-6a+6b+9
=(a-b)^2-6(a-b)+9
=(a-b-3)^2
供参考答案3:
a^2+b^2-6a+6b-2ab
=（a^2+b^2-2ab）-6(a-b)+9
=(a-b)^2-6(a-b)+3^2
=[(a-b)-3]^2
(a-b-3)^2