Question

dada a função t(x)=-3x²+2x+5 determine as coordenadas do vértice da parabola

Answer 1

a= -3
b=2
c=5

Yv = - (B² - 4ac)
         ---------------
            4a

Xv = -B/2a

Xv = -2/ 2.(-3)  = -2/-6   = 1/3

Yv = -(2² - 4 . (-3) . 5)  : 4(-3)  = -64 /-12  = 16/3

( Xv = 1/3   e Yv = 16/3 )