Question

1) Determine as raízes reais de cada equação indicada.


a) 9x²-81=0
b) x² - 100 =0
c) 3x²-12-0
d)x²+16=
e) 6x²-54
5²x+x=0
g) x²+X=0
h) 7x²-X=0
I) 2x² = 7x​​

Answer 1

Resposta:

a) 9x^2=81

x^2=81/9

x^2=9

x= raiz de 9

x= 3

b) x^2= 100

x= raiz de 100

x= 10

c)3x^2=12

x^2= 4

x= raiz de 4

x= 2

d)x^2= -16

x= não existe

e)x^2=54/6

x^2= 9

x= raiz de 9

x=3

f)25x^2=0

x= raiz de 25

x= 5

g)x^3=0

h)7x=0

x= 0/-7

x=0

i)2x+x= 7x

9x^2=

x= raiz de 9

x= 3