Question

Resolva as equações:

a) x² – 25 = 0

b) 2x²- 98 = 0

c) 24 = 6x²

d) 64x² - 1 = 0

e) 7x² – 14 = 0

f) -X² + 49 = 0

g) -25 + 100x² = 0

h) x²- 81/4 = 0

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Answer 1

Explicação passo-a-passo:

a)x²-25=0

x²= 25

x= ±√25

x=±5

b) 2x²-98=0

2x² =98

x²= 98/2

x²= 49

x= ±√49

x= ±7

c) 24= 6x²

24/6=x²

x²= 4

x= ±√4

x= ±2

d) 64x²- 1=0

64x²=1

x²= 1/64

x= ±√1/64

x= ±1/8

e) 7x²-14=0

7x²=14

x²= 14/7

x²=2

x=±√2

f)-x²+49=0

49=x²

x= ±√49

x= ±7

g)-25 +100x²=0

100x²= 25

x²= 25/100

x= ±√25/100

x= ±5/10

x= ±1/2

h) x² - 81/4=0

x²=+81/4

x= ±√81/4

x= ±9/2