Question

O ponto A tem abscissa nula e dista 5 de B (4, 4). Determine a ordenada do ponto A.​

Answer 1

A(0, y)

B(4, 4)

(0-4)²+(y-4)²= 5²

16 + (y-4)²= 25

(y-4)² = 9

y-4 = ±√9

y-4= ±3

=> y-4=+3 => y'=7 ✓

=> y-4=-3 => y"=1 ✓