Question

resolva as equações abaixo

a) x*2+7x=0

b)3x*2-x=0

c)6x*2-4x=0

d)x*2-1=0

e)x*2+x=0

f)2x*2+x-3=0


g)2x*2-9x+4=0


h)6x*2-5x-1=0

i)x*2+6x-7=0

j)x*2+2x-1=0

k)9x*2-16=0

Answer 1

a) 2x+7x=0
9x=0

b) 6x-x=0
5x=0

c)12x-4x=0
8x=0

d) 2x-1=0
x=1/2

e) 2x+x=0
3x=0

f)4x+x-3=0
5x=3
x=3/5

g)4x-9x+4=0
-5x=-4 (*-1)
5x=4
x=4/5

h)12x-5x-1=0
7x-1=0
x=1/7

I)2x+6x-7=0
8x=7
x=7/8

j)2x+2x-1=0
4x=1
x=1/4

k)18x-16=0
x= 16/18
x=8/9