Question

Calcule o valor numérica,na forma decimal,da expressão algébrica.

Me ajudem kk

Answer 1

$\Large\boxed{\begin{array}{l}\sf\dfrac{1}{x}-x+\sqrt{x},quando~x=4\\\\\sf\dfrac{1}{4}-4+\sqrt{4}\\\\\sf\dfrac{1}{4}-4+2\\\\\sf\dfrac{1}{4}-2=\dfrac{1-8}{4}=-\dfrac{7}{4}\blue{\checkmark}\end{array}}$