Question

 como resolvo esta questao 7X²-X=0

Answer 1

7x²-x=0

Δ=b²-4*(a)*(c)
Δ=(-1)²-4*(7)*(0)
Δ=1

x'=(-b+√Δ)/2*(a)
x'=(-1+√1)/2*(7)
x'=(-1+1)/14
x'=0

x"=(-b-√Δ)/2*(a)
x"=(-1-√1)/2*(7)
x"=(-1-1)/14
x"=-2/14
x"=-1/7

S={0, -1/7}

Renato.