Question

utilizando a regra pratica decomponha os numeros a seguir em fatores primos a) 20 b)15 c) 28

Answer 1

$\sf{a)}~\begin{array}{c|l}\sf{20}&\sf{2}\\\sf{10}&\sf{2}\\\sf{5}&\sf{5}\\\sf{1}\end{array}\\\huge\boxed{\boxed{\boxed{\boxed{\boxed{\sf{20=2^2\cdot5}}}}}}$

$\sf{b)}~\begin{array}{c|l}\sf{15}&\sf{3}\\\sf{5}&\sf{5}\\\sf{1}\end{array}\\\huge\boxed{\boxed{\boxed{\boxed{\boxed{\sf{15=3\cdot5}}}}}}$

$\sf{c)}~\begin{array}{c|l}\sf{28}&\sf{2}\\\sf{14}&\sf{2}\\\sf{7}&\sf{7}\\\sf{1}\end{array}\\\huge\boxed{\boxed{\boxed{\boxed{\boxed{\sf{28=2^2\cdot 7}}}}}}$