Find the vertex of this parabola. y = -2x2 + 4x + 12

For this case we have the following equation:
 
 Deriving we have:
 
 We match zero:
 
 We clear the value of x:
 
 Then, we substitute the value of x in the equation of the parabola:
 
 Thus, the vertex of the parabola is the ordered pair:
 
 
 The vertice is:
 

The answer is 10 bud

Def is a scalene triangle