Question

Respondam rápido pfv

Answer 1

Resposta:

e) S = {-4,5}

f) S = {-5,-5}

Explicação passo-a-passo:

e) b² - 4.a.c

1²+ 80

delta = √81

x = -b±√delta/2a

x' = (-1)+9/-2

x'= 8/-2 = -4

x''=(-1)-9/-2

x''=-10/-2 = 5

f)b² - 4.a.c

a=1

b=10

c=25

10² -4.1.25 = delta

delta = 100-100

delta = 0

x = -b±√delta/2a

x' = -10+0/2

x' = -5

x'' = -10-0/2

x'' = -5