Question

1. Determine o valor de x. ( 1° caso )
a) x2 - 225 = 0
b) x2 - 729 = 0
c) x2 +144 = 0
d) x2 - 18 = 82
e) 2x2 - 32 = 0
f) 5x2 + 20 = 0
20 caso​

Answer 1

Resposta:

A) x2 - 225 = 0

x2= 225

x=225/2

x= 112,5

B) x2 - 729 = 0

x2= 729

x= 729/2

x= 364,5

C) x2 + 144 = 0

x2 = - 144

x = - 144/2

x = - 72

D) x2 - 18 = 82

x2 = 18 + 82

x2 = 100

x = 100/2

x= 50

E) 2x2 - 32 = 0

4x - 32 = 0

4x = 32

x = 32/4

x= 8

F) 5x2 + 20 = 0

10x + 20 = 0

10x = - 20

x = - 20/10

x = - 2

Espero ter ajudado!!!❤️