Question

quais sao as raizes da funçao y=x²+4x

Answer 1

y=x^2+4x
x^2+4x=0
delta=b^2-4.a.c
delta=4^2-4.1 0
delta=16-0
delta=16
x=-b-/+ raiz de delta / 2a
x=-4-4/2.1
x=-8/2
x=-4
x=-4+4/2.1
x=0/2
x=0