Question

Resolva:
a)x²+x=0
b)2x²-5x=0
c)3x²=9x
d)x(x+3=0
e)2x(x-4)=0

Answer 1

a)x²+x=0
1x+1x=0
2x=0
x= 0/2
x= 0

b) 4x-5x=0
-1x=0
x=0/-1
x=0

c) 3.3x=9x
9x-9x=0
0=0

d) x(x+3=0
1x(1x+3=0
1x+4x=0
5x=0
x= 0/5
x=0

e)2x(x-4)=0
2x(1x-4)=0
2x-3x=0
-1x=0
x= 0/-1
x=0