Question

如果直线3x-2y+6=0分别交与x轴、y轴于A、B两点,求AB的长度

Answer 1

当x = 0 时,y = 3 B(0,3)

当y =0 时,x = -2 A(-2,0)

AB^2 = 3^2 +2^2

= 13

AB = 根号13.