Question

t ao quadrado- 15t +56 = 0

Answer 1

t^2-15t+56=0
delta=b^2-4ac
delta=(-15)^2-4.1.56
delta=225-224
delta=1
t=-b-/+ raiz de delta/2a
t=-(-15)-1/2.1
t=15-1/2
t=14/2
t=7
t=-(-15)+1/2.1
t=15+1/2
t=16/2
t=8