Question

o valor numerico da expressão 2.b²+8, para b=3 é:

Answer 1

$\mathtt{2{b}^{2}+8\big|_{b=3}=2.{3}^{2}+8}\\\mathtt{2{b}^{2}+8\big|_{b=3}=2.9+8}}$

$\large\boxed{\boxed{\mathtt{2{b}^{2}+8\big|_{b=3}=26}}}$