Question

Encontre as solução das equações.
a)x²-2x=0
b)x²+7x=0
c)2x²-10x=0
d)3x²+12x=0
e)10x²-15x=0

Answer 1

a) x(x-2)=0
x1=0 e x2=+2

b) x(x+7)=0
x1=0 e x2=-7

c) x(2x-10)=0
x1=0 e
2x-10=0
2x=10
x=10/2
x2=5

d)x(3x+12)=0. x1=0
3x+12=0
3x=-12
x=-12/3
x2= -4

e)x(10x-15)=0
x1=0
10x-15=0
10x=15
x=15/10
x2=3/2