Question

determine a vertice da parábola -x-2x-5​

Answer 1

Resposta:

f(x)= -x-2x-5. a= -1/ b= -2 / c= -5

Xv= -b

----

2a

Xv= -(-2)

-------

2(-1)

Xv= 2

---

-2

Xv= -1

Yv= -∆ ∆= b²-4ac

------ ∆= -2²-4.-1.-5

4a ∆= 4-20

∆= -16

Yv= -(-16)

---------

4.(-1)

Yv= 16

-----

-4

Yv= -4

V(x,y) = V (-1,-4)