Question

2- Resolver as equações:
X2 -49=0
b) 2x2-50 =0
7x2-7=0
d) X2 + 36 =0
e) X2-27=0
c)
3- Determine as soluções:
a) 5x2 + x=0
b) 4x2-12x=0
c) 4x2-9x=0
d) X2+5x=0
e) X2-7x=0

preciso urgente !!!!!​

Answer 1

2-

a) x2 - 49 = 0

2x - 49 = 0

2x = 49

x = 49/2

b) 2x2 - 50 = 0

4x - 50 = 0

4x = 50

x = 50/4

x = 25/2

c) 7x2 - 7 = 0

14x - 7 = 0

14x = 7

x = 7/14

x = 1/2

d) x2 + 36 = 0

2x + 36 = 0

2x = -36

x = -36/2

x = -18

e) x2 - 27 = 0

2x - 27 = 0

2x = 27

x = 27/2

3-

a) 5x2 + x = 0

10x + x = 0

11x = 0

x = 0

b) 4x2 - 12x = 0

8x - 12x = 0

-4x = 0

x = 0

c) 4x2 - 9x = 0

8x - 9x = 0

-x = 0

x = 0

d) x2 + 5x = 0

2x + 5x = 0

7x = 0

x = 0

e) x2 - 7x = 0

2x - 7x = 0

-5x = 0

x = 0

Espero ter ajudado! :')