Question

Resolva as equações do segundo grau.
a) x' - 5x + 6 = 0
b)x - 3x + 2 = 0
c) x² + 3x - 100
d) 9x + 9x + 2 = 0
e) 4x + 4x 150
20x' + 6x - 2 = 0
8) 6x - 17x - 3=0
h) 4x - 11x+6=0
) 187 - 30x-1=0
1 4 - 12x + 70
k) 25x – 20x+2=0
11 x - 7x+3=0

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Answer 1

Resposta:

a) x - 5x + 6 = 0

- 4x + 6= 0

-4x = -6

x = 3/2

b) x - 3x + 2 = 0

- 2x+ 2 = 0

-2x = -2

x = 1

c) x² + 3 x - 100

não sei se trm resultado

d) 9x + 9x + 2 = 0

18x + 2 = 0

18x = -2

x= -1/9

e) 4x + 4x 150

4x + 600x

604x

f) 20x + 6x - 2 = 0

26x- 2 = 0

26x = 2

x = 1/13

g) 6x -17x - 3 = 0

- 11x -3 = 0

-11 x = 3

x = - 3/11

h) 4x - 11x +6 = 0

-7x + 6 = 0

-7x = -6

x= 6/7

i) 187-30x - 1 = 0

186 - 30x = 0

-30 x = - 186

x= 31/5

j) 4 - 12x + 70 se for outra coisa <<>> 14 - 12x + 70

74 - 12x 84 - 12x

2(37-6x) 12 ( 7-x )

k) 25x - 20x + 2 =0

5x + 2 = 0

5x = - 2

x = - 2/5

l) 11x- 7x + 3 =0

4x + 3 = 0

4x = -3

x = -3/4

Boa sorte S2 :)