Question

Помогите плиз!!!!!!!!​

Answer 1

Подставим y=0

$0=-x^{2} -4x-3\\ -x^{2} -4x-3=0\\x^{2} +4x+3=0\\x^{2} +3x+x+3=0\\x*(x+3)+x+3=0\\(x+3)*(x+1)=0\\x+3=0 или x+1=0\\x_{1}=-3 \\ x_{2}=-1$