来自李健君的问题
分解因式:9-6y-x2+y2=______.
分解因式:9-6y-x2+y2=______.
1回答
2020-09-1309:34
分解因式:9-6y-x2+y2=______.
分解因式:9-6y-x2+y2=______.
9-6y+y2-x2
=(3-y)2-x2
=(3-y+x)(3-y-x).
故答案为:(3-y+x)(3-y-x).