x的平方-y的平方+ax+ayx²-y²+ax+ay=(x+y)(x-y)+a(x+y)=(x+y)(x-y+a)=(x+y)(x-y+a)这里看不懂求解
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x的平方-y的平方+ax+ayx²-y²+ax+ay=(x+y)(x-y)+a(x+y)=(x+y)(x-y+a)=(x+y)(x-y+a)这里看不懂求解
x的平方-y的平方+ax+ay
x²-y²+ax+ay
=(x+y)(x-y)+a(x+y)
=(x+y)(x-y+a)
=(x+y)(x-y+a)这里看不懂求解
x的平方-y的平方+ax+ayx²-y²+ax+ay=(x+y)(x-y)+a(x+y)=(x+y)(x-y+a)=(x+y)(x-y+a)这里看不懂求解
提取公因式
=(x+y)(x-y)+a(x+y)
=(x+y)[(x-y)+a]
=(x+y)(x-y+a)
提公因式
通俗点说 就是这个式子同时除以(x+y) 再乘以(x+y)
第一步使用平方差公式
第二步是提取公因式(x+y)