Question

Resolva as equações :
x² + 4 x + 3=0

Answer 1

X2-4x×3=0
ax2+bx+c=0
A=1
B=-4
C=3
2=b2-4ac=(-4)2-4.1.3=16-12=4
=2

X'=b/2a+/2a=4/2+2/2=3
X"=b/2a-/2a=4/2-2/2=1