Question

encontre as raizes da função real G(x) 2x²-6x-20

Answer 1

G(x)=2x^2-6x-20
2x^2-6x-20=0
delta=b^2-4.a.c
delta=(-6)^2-4.2.(-20)
delta=36+160
delta=196
x=-b-/+ raiz de delta / 2a
x=-(-6)-14/2.2
x=6-14/4
x=-8/4
x=-2
x=-(-6)+14/2.2
x=6+14/4
x=20/4
x=5