Question

qual a resposta
2x^2+18x+4=0

Answer 1

Resposta:

S={ -5√73;-4√73}

Explicação passo-a-passo:

2x²+18x+4=0

a=2. b=18. c)4

∆=b²-4.a.c

∆= 18² - 4.2.4

∆= 324 - 32

∆= 292

X=-b±√∆ / 2a

X= -18±√292 /2.2

X= -18±√2²×73 / 4

X=-18±2√73 /4

X'= -18-2√73/4

X'= -20√73/4

X'= -5√73

X"= -18+2√73 /4

X"= -16√73 /4

X"= -4√73