Question

Determine o valor de k, de modo que a distancia de A(k,1) e B(-2,4) seja igual a 5

Answer 1

(k+2)²+(1-4)²=(5)²

(k+2)² +9 =25

(k+2)²= 16

k+2 =√16

k+2 = ±4 ↓

{k+2=+4=> k'=2 ✓

{k+2=-4=> k"=-6 ✓