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

x= ±√25

x= ±5

b) 2x² = 98

x²= 98/2

x² = 49

x= ±√49

x = ±7

c) 24/6= x²

4 = x²

x= ±√4

x= ±2

d) 64x² = 1

x² = 1/64

x = ±√1/64

x = ± 1/8

e) 7x² =14

x² = 14/7

x²= 2

x= ±√2

f) 49= x²

x= ±√49

x= ±7

g) 100x²= 25

x² = 25/100

x= ±√25/100

x = ± 5/10

h) x²= 81/4

x = ±√81/4

x= ±9/2