Question

b) x2 − 2x = 0

23
c) −3x2
+ x = 0

d) x2 − 3x = 0

e) 2x2
= −4x
ME AJUDA POR FAVOR

Answer 1

Resposta:

Vamos lá!

Pela soma e produto das raízes, temos:

x² − 2x = 0

$x'+x''=-\dfrac{b}{a} =-\dfrac{(-2)}{1} =+2\\\\x'*x''=0\\\\S=\{2,0\}$

−3x² + x = 0

$x'+x''=-\dfrac{b}{a} =\dfrac{-1}{-3} =\dfrac{1}{3} \\\\x'*x''=0\\\\S=\{\dfrac{1}{3} ,0\}$

x² − 3x = 0

$x'+x''=-\dfrac{b}{a} =-\dfrac{(-3)}{1} =+3\\\\x'*x''=0\\\\S=\{3,0\}$

2x² = − 4x

2x² + 4x = 0

$x'+x''=-\dfrac{b}{a} =-\dfrac{4}{2} =-2\\\\x'*x''=0\\\\S=\{-2,0\}$

Bons estudos!!!

Prof Alexandre