Find the axis of symmetry. y = –x2 + 4x + 2?

y = –x^2 + 4x + 2

Completing the square:

y = -(x – 2)^2 + 6

The axis of symmetry is x = 2.

y = x² – 4x – 2 Parabola is in everyday sort ax² + bx + c, the place a = a million, b = – 4, c = – 2 Equation of the axis of symmetry is x = – b/2a = – – 4/2(a million) = 2 it is the x-coordinate of the vertex. fixing the function for this fee supplies the y-coordinate. y = 2² – 4(2) – 2 = 4 – 8 – 2 = – 6 Vertex is (2, – 6).

I agree with Rackbrane. Basically, you need to use the completing the square method. When you do that, you should obtain as vertex X=2, Y=6

the formula is -b/(2a) = -4/-4 = 1

iono?