Question

Find the vertex of the parabola whose equation is y = x2 - 4x + 3.

Answer 1

when it comes to the parabola questions, it is wise of us to know that the parabola can be described as ax^2+bx+c=0(a is not 0); the x of the vertex is -b/(2a), then we will find out the value y:
doing like this:
a=1;b=-4 so the vertex P(x1,y1)
x1=-b/(2a)=4/2=2
y1=2^2-4*2+3=-1
so P(2,-1)