Question

Qual a resposta certa dessas alternativas?

3x² - 12 = 0
A) S = {-4;0}
B) S = {-2;2}
C) S = {-2;0}
D) S = {0;4}
E) S = {0;2}
F)S = { }

x² - 36 = 0
A) S= {-6;0}
B) S = {0;6}
C) S = {0;36}
D) S = {-36;0}
E) S = {-6;6}
F) S = { }

x² - 25x = 0
A) S = {0;5}
B) S = {0;25}
C) S = { }
D) S = {-5;0}
F) S = {-5;5}
G) S = {-25;0}

2x² + 18 = 0
A) S = { }
B) S = {-3;3}
C) S = {-9;0}
D) S = {-3;0}
E) S = {0;3}
F) S = {0;9}

2x² + 32x = 0
A) S = {-4;4}
B) S = {-4;0}
C) S = {-16;0}
D) S = { }
E) S = {0;16}
F) S = {0;4}​

Answer 1

Resposta:

3x² - 12 = 0

R:c)

x² - 36 = 0

R:a)