Question

1 resolva as equações incompletas

a)x²-7x=0
b)3x²-12x=0
c)x²+4x=0
d)5x²+x=0​

Answer 1

Resposta:

a) x²-7x=0

x(x-7)=0 , logo x,=0 e x,,-7=0~ x,,=7

b)3x²-12x=0

3x(x-4)=0 , logo 3x,=0 -> x,=0 e

x,,-4=0 ->x,,=4

c)x²+4x=0

x(x+4)=0 , logo x,=0 e x,,=-4

d)5x²+x=0

x(5x-1)=0 , logo x,=0 e 5x,,-1=0 ->x,,=1/5~ 0,2