Question

como calculo 4xelevado ao quadrado-10x+4=0 ?

Answer 1

Olá!

$Formulas:\left[\begin{array}{ccc}\Delta = b^2-4.a.c\\ \\ \\x' = \frac{-b\± \sqrt{\Delta} }{2.a} \end{array}\right]$

$informa\c{c}\~oes: \left[\begin{array}{ccc}a&=&4&\\b&=&-10&\\c&=&4&\end{array}\right]$

$\Delta = (-10)^2-4.4.4\\\Delta=100-64\\\Delta=36$

$x' = \frac{-(-10) + \sqrt{36} }{2.4}=x' = \frac{10+ 6 }{8} = \frac{16}{8} = 2\\ \\ \\x'' = \frac{-(-10) - \sqrt{36} }{2.4}=\frac{10 - 6}{8} = \frac{4}{8} = 0,5$

Qualquer dúvida comente ;)
Bons estudos!