Question

resposta da equaçao de 2 grau: 3x²+55=0 e x²-6x=0

Answer 1

a) 3x² + 55 = 0

3x² = - 55 

x² = -55/3

x = √(-55/3) = Não existem raízes reais.


b) x² - 6x = 0

x(x - 6) = 0

x = 0

x - 6 = 0
x = 6 

solução: As raizes são 0 e 6.


Espero ter ajudado.

Answer 2

$3 x^{2} +55=0\\\\3x^2=-55\to\\\\ x^2=- \dfrac{55}{3} \to\\\\ x=\pm \sqrt{- \dfrac{55}{3} } \\\\\\N\~ao~~existe~~raiz~~dentro~~do~~conjunto~~dos~~reais.$




$x^{2} -6x=0\\\\ Por~~Evid\^encia:\\\\\\ x(x-6)=0\\\\ \boxed{x=0}\\\\ x-6=0\to~~\boxed{x=6}\\\\\\ \large\boxed{\boxed{S=\{0~;~6\}}}$