Question

A soma dos de (a+b+c) da equação de 2ºgrau, X2+2x -13=0 é

Answer 1

A soma (a + b + c) [é igual a $-10$

Na equação $x^2 + 2x - 13 = 0$, temos que:

$a = 1\\\\b = 2\\\\c = -13\\\\(a + b + c)\\\\1 + 2 +(-13)\\\\1 + 2 - 13\\\\3 - 13\\\\-10$

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Answer 2

$\Large\displaystyle\begin{gathered} \sf{x^2+2x-13=0 } \end{gathered}$

$\Large\displaystyle\text{ \begin{gathered} \sf{\begin{cases} \sf a=1\\\sf b=2\\\sf c=-13\end{cases} } \end{gathered} }$

$\Large\displaystyle\begin{gathered} \sf{ (a+b+c)=1+2+(-13)} \end{gathered}$

$\Large\displaystyle\begin{gathered} \sf{(a+b+c)=1+2-13 } \end{gathered}$

$\Large\displaystyle\begin{gathered} \sf{(a+b+c)=3-13 } \end{gathered}$

$\Large\displaystyle\text{ \begin{gathered} \blue{\underline{\boxed{\sf{(a+b+c)=-10 }}}} \end{gathered} }$