Question

achar as raizes da equação x²-3x-4=0 conta

Answer 1

x²-3x-4=0
x = 3 +- 5/2
x' = 4
x" = - 1

S = { 4 ; - 1 }

Answer 2

x^2-3x-4=0
delta=b^2-4ac
delta=(-3)^2-4.1.(-4)
delta=9+16
delta=25
x=-b-/+ raiz de delta/2a
x=-(-3)-5/2.1
x=3-5/2
x=-2/2
x=-1
x=-(-3)+5/2.1
x=3+5/2
x=8/2
x=4