Question

Resolva
a) 3x²+5x= -x-4+2x²
b) 4+x(x-4)=x
c) x(x+3)-40=0
d)x²-5x+6=0
e)x²-7x+12=0

Answer 1

a)9x+5x=-x-4+4x
9x+5x+x-4x=-4
14x-3x=-4
11x=-4
x=-4/11

b)4+2x-4x=x
2x-4x-x=-4
-2x-x=-4
-3x=-4
x=-4/-3

c)2x+3x-40=0
2x+3x=0+40
5x=40
x=40/5

d)2x-5x+6=0
2x-5x=0-6
-3x=-6
x=-6/-3

e)2x-7x+12=0
2x-7x=0-12
-5x=-12
x=-12/-5

OBS:Eu comecei a fazer as contas sem repetir o início

Tenha uma boa noite