Question

eu preciso fazer essa conta f (x)=3x2( o dois e elevado ) + 3x= 0

Answer 1

Resposta:

Explicação passo-a-passo:

1)

$f(x)=3x^2+3x\\3x^2+3x=0\ (:3)\\x^2-x=0\\\Delta=(-1)^2-4.1.0\\\Delta=1\\x=\frac{-(-1){\pm}\sqrt{1} }{2.1}\\x'=1\ e\ x"=0$

2)

$X_v=-\frac{b}{2a}\\\\X_v=-\frac{(-1)}{2.1}\\\\X_v=\frac{1}{2}\\\\Y_v=-\frac{\Delta}{4a}\\\\Y_v=-\frac{1}{4.1}\\\\Y_v=-\frac{1}{4}$

3) ver anexo

$\left[\begin{array}{cc}x&y\\-2&6\\-1&2\\\frac{1}{2}&-\frac{1}{4}\\1&0\\2&2 \\\end{array}\right]$