已知x.y为正整数,且满足x²-y²=11,求x,y的值
问题描述:
已知x.y为正整数,且满足x²-y²=11,求x,y的值
答
x²-y²=(x+y)(x-y)=11
则x+y=11
x-y=1
则x=6,y=5