Question

equação do 2 grau f(x)=x²-18x

Answer 1

f(x)=x^2-18x
x^2-18x=0
delta=b^2-4.a.c
delta=(-18)^2-4.1.0
delta=324-0
delta=324
x=-b-/+ raiz de delta/2a
x=-(-18)-18/2.1
x=18-18/2
x=0/2
x=0
x=-(-18)+18/2.1
x=18+18/2
x=36/2
x=18