Question

Resolva as seguintes equações incompletas do 2° grau
-15x²-3x=0

Answer 1

$-15x^2-3x=0(-1)\\15x^2+3x=0(fatorando)\\\\3x(5x+1)=0\\3x_1=0\\x_1=0\\\\5x+1=\\5x=1\\x_2=\frac{1}{5}\\\\S=(0,\frac{1}{5})$

Answer 2

15x^2 + 3x = 0
3x(5x+1)=0
x1=0
x2=-1/5