因式分解:4+12(X-Y)+[9乘以(X-Y)的

因式分解:4+12(X-Y)+[9乘以(X-Y)的平方]

3个回答

4+12(X-Y)+[9乘以(X-Y)的平方]
=4+12x-12y+[9(x-y)的平方]
=4+12x-12y+(9x的平方-9y的平方)
=4+12x-12y+9x的平方-9y的平方