X^2-Y^2+6X+10Y-30=0 X^2+Y^2-5X-8Y+21=0 X=?Y=?
问题描述:
X^2-Y^2+6X+10Y-30=0 X^2+Y^2-5X-8Y+21=0 X=?Y=?
答
X^2-Y^2+6X+10Y-30=0 =>(x+3)^2-(y-5)^2=14 =>x+y=3(或16或,2或,9),x-y=6(或-7或.-6,或1).