Question

Calcule a distancia entre as retas paralelas 3x+4y-18=0 e 3x+4y+7=0

Answer 1

A....B...C
↓....↓....↓
3x+4y-18=0
3x+4y+7=0

d = C-C' / √A²+B²

d = 7-(-18) / √3²+4²

d = 7+18 / √9+16

d = 25 / √25

d = 25 / 5

d = 5 ✓

Answer 2

d = (c1 - c2)/(√a²+b²)

d = (7 + 18)/√25

d = 25/5

d = 5