Question

determine o valor de x qual e o discriminante da equacao x2+9x+8+0

Answer 1

Olá!

${x}^{2} + 9x + 8 = 0$

a = 1
b = 9
c = 8


/\ = b² - 4 . a . c
/\ = 9² - 4 . 1 . 8
/\ = 81 - 32
/\ = 49

x= -b + - √ /\ /2 . a

x'= -9 + 7 /2
x'= -2 /2
x'= -1

x"= -9 - 7 /2
x"= -16 /2
x"= -8

S={ -1, -8}