Question

x-y-1=0 y的平方=2x-2 解方程组

Answer 1

将x-y-1=0 即x=y+1代入

y^2=2x-2

y^2=2(y+1)-2

y^2=2y

得 y1=0 或y2=2

代入x=y+1

得x1=1,或 x2=3