Question

calcule dab=3; A (0,2) e B (x,1)x=?

Answer 1

dab² = (xa - xb)² + ( ya - yb)²
3² = ( x-0)² + ( 1-2)²
9 = x² + 1
x² = 9-1
x = √8

x = 2√2

att: Jhonny