Question

equação do 2 grau x² + 5x + 4 = 0

Answer 1

x'=-4
x''=-1

A=1 B=5 C=4

Δ=B²-4.A.C
Δ=5²-4.1.4
Δ=25-16


X= $\frac{-5+/- \sqrt{9} }{2x1}$=9
X= $\frac{-5+/-3}{2}$

X'=$\frac{-5-3}{2}$
X'=$\frac{-8}{2}$
X'=-4

X''=$\frac{-5+3}{2}$
X''=$\frac{-2}{2}$
X''=-1