Question

Resolva as equaçoes do 2 grau imcompletas

a) 800x²-2x=0

b) 2x²-800=0

Answer 1

a) 800x^2-2x=0
delta=b^2-4ac
delta=(-2)^2-4.800.0
delta=4-0
delta=4
x=-b-/+ raiz de delta/2a
x=-(-2)-2/2.800
x=2-2/1600
x=0/1600
x=0
b) 2x^2-800=0
delta=b^2-4ac
delta=0^2-4.2.(-800)
delta=0+6400
delta=6400
x=-b-/+ raiz de delta/2a
x=-0-80/2.2
x=-80/4
x=-20
x=-0+80/2.2
x=80/4
x=20