Question

Determine a soma e o produto das equações: (Valor 1,0)
a) 3r2 - 7r + 2 = 0
b) -2x2 - 4x – 2 = 0

Answer 1

$\boxed{\begin{array}{l}\tt a)~\sf 3r^2-7r+2=0\\\sf s=-\dfrac{-7}{3}=\dfrac{7}{3}\\\\\sf p=\dfrac{c}{a}=\dfrac{2}{3}\\\\\tt b)~\sf s=-\dfrac{b}{a}=-\dfrac{-4}{-2}=-2\\\\\sf p=\dfrac{c}{a}=\dfrac{-2}{-2}=1\end{array}}$