Question

quanto é 8m² - 40m = 0

Answer 1

8m^2-40m=0
delta=b^2-4.a.c
delta=(-40)^2-4.8.0
delta=1600-0
delta=1600
m=-b-/+ raiz de delta/2a
m=-(-40)-40/2.8
m=40-40/16
m=0/16
m=0
m=-(-40)+40/2.8
m=40+40/16
m=80/16
m=5