Question

resolva as equações:
(se puder fazer numa folha, me manda a foto por favor!!)
a) x²-25=0

b) 2x²-98=0

c) 24=6x²

d) 64x²-1=0

Answer 1

a) x^2 - 25 = 0
x^2 = 25
x= +,- \/25
x = +,- 5

b) 2x^2 - 98 = 0
2x^2 = 98
x^2 = 98/2
x^2 = 49
x = +,- \/49
x= +,- 7

c) 24 = 6x^2
24/6 = x^2
4 = x^2
x^2 = 4
x = +,- \/4
x = +,- 2

d) 64x^2 - 1 = 0
64x^2 = 1
x^2 = 1/64
x = \/1/64
x = \/1/ \/64
x = 1/8

Answer 2

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
- 6x²+24=0
- 6x²= -24 (-1)
6x²= 24
x²= 24/6
x²= 4
x=√4
x = ± 2

d) 64x²-1=0
64x²= 1
x²= 1/64
x=√1/64
x = ± 1/8