Question

Encontre as raízes das equações do 2º grau incompletas: a) x² - 169 = 0 b) X2-225 = 0 d) 7x2 - 63 = 0 c) x² - 400 = 0 ) 2x2 - 50 = 0 e) 2x2 - 18 = 0 9) 3x2 - 75 = 0 h) 4x2 + 100 = 0 J) 7x2 + 2 = 30 :) 2x2 = 50​

Answer 1

A)
x²- 169 = 0
x² = 169
X = +/- 13
raizes= X1 = -13 X2 = 13

B)
x² 225=0
x² = 225
X=+/-15
Raizes= X=-15 x=15

C)

x²-400=0
x² =400
X=+/-20
raizes-X=-20 X=20

D)

7 x²-63 =0
x²-9=0
x² =9
X=+/-3
Raizes= X=-3 X=3

E)

2 x²-18=0
x²-9=0
x² =9
X=+/-3
Raizes= X=-3 X=3

F)

3 x²-75=0
x²- 25=0
x^2= 25
X=+/-5
Raizes= X=-5 X=5

G)

x²-50=0
x²- 25 =0
x= 25
X=+/-5
Raizes=X=-5 X=5

H)

7x² =30
7 x² =30 - 2
7 x² =28
x² =4
X=+/-2
Raizes= X=-2 X=2

I)

2x² =50
x² = 25
X=+/-5
raizes=X=-5 X=5

Espero ter ajudo :)

Estude Bastante ^^