Question

初二解方程组题目一道——————————————————————————

Answer 1

（x+y-5）(x+y+2)=0

(x-4y)²=25

得x1=5,y1=0

x2=3,y2=2

x3=-3/5,y3=-7/5

x4=-13/5,y4=3/5