Question

QUESTÃO 06
Resolva a equação x2 - 10x + 16 = 0 ​

Answer 1

Explicação passo-a-passo:

$\sf x^2-10x+16=0$

$\sf \Delta=(-10)^2-4\cdot1\cdot16$

$\sf \Delta=100-64$

$\sf \Delta=36$

$\sf x=\dfrac{-(-10)\pm\sqrt{36}}{2\cdot1}=\dfrac{10\pm6}{2}$

$\sf x'=\dfrac{10+6}{2}~\Rightarrow~x'=\dfrac{16}{2}~\Rightarrow~\red{x'=8}$

$\sf x"=\dfrac{10-6}{2}~\Rightarrow~x"=\dfrac{4}{2}~\Rightarrow~\red{x"=2}$