16-8(x-y)+(x+y)的平方
问题描述：
16-8(x-y)+(x+y)的平方
答
16-8(x-y)+(x+y)的平方
=(x+y)²-8(x-y)+16
=(x+y)²-2*(x-y)*4+4²
=(x+y-4)²16-8（x-y）+(x-y)²=4²-2×4(x-y)+(x-y)²=(4-x+y)²=(x-y-4)²对，你题目写错了，后面括号内写成+了，对应更正为：16-8(x-y)+(x-y)的平方=(x-y)²-8(x-y)+16=(x-y)²-2*(x-y)*4+4²=(x-y-4)² 两个解法都可以16-8（x-y）+(x-y)²=4²-2×4(x-y)+(x-y)²=(4-x+y)²=(x-y-4)²这个计算是正确的