Question

calcule a distancia do ponto (4.2) a reta 5x+y-5=0

Answer 1

$D= |\frac{5x+y-5}{ \sqrt{ a^{2}+ b^{2} } } | \\ \\ D= |\frac{5.4+1.2-5}{ \sqrt{ 5^{2}+ 1^{2} } } | \\ \\ D= |\frac{20+2-5}{ \sqrt{ 25+1 } } | \\ \\ D= |\frac{17}{ \sqrt{ 26 } } |$