The problem asks to graph the given quadratic functions and find the vertex and axis of symmetry for each. The given functions are: (1) $y = x^2 - 6x + 5$ (2) $y = 2x^2 + 8x + 3$ (3) $y = -3x^2 + 6x + 1$ (4) $y = -x^2 - 4x + 2$

AlgebraQuadratic FunctionsCompleting the SquareVertexAxis of SymmetryParabola
2025/6/24

1. Problem Description

The problem asks to graph the given quadratic functions and find the vertex and axis of symmetry for each. The given functions are:
(1) y=x26x+5y = x^2 - 6x + 5
(2) y=2x2+8x+3y = 2x^2 + 8x + 3
(3) y=3x2+6x+1y = -3x^2 + 6x + 1
(4) y=x24x+2y = -x^2 - 4x + 2

2. Solution Steps

We will complete the square for each quadratic function to find the vertex form, y=a(xh)2+ky = a(x-h)^2 + k, where (h,k)(h, k) is the vertex and x=hx = h is the axis of symmetry.
(1) y=x26x+5y = x^2 - 6x + 5
y=(x26x+9)9+5y = (x^2 - 6x + 9) - 9 + 5
y=(x3)24y = (x - 3)^2 - 4
Vertex: (3,4)(3, -4)
Axis of symmetry: x=3x = 3
(2) y=2x2+8x+3y = 2x^2 + 8x + 3
y=2(x2+4x)+3y = 2(x^2 + 4x) + 3
y=2(x2+4x+4)2(4)+3y = 2(x^2 + 4x + 4) - 2(4) + 3
y=2(x+2)28+3y = 2(x + 2)^2 - 8 + 3
y=2(x+2)25y = 2(x + 2)^2 - 5
Vertex: (2,5)(-2, -5)
Axis of symmetry: x=2x = -2
(3) y=3x2+6x+1y = -3x^2 + 6x + 1
y=3(x22x)+1y = -3(x^2 - 2x) + 1
y=3(x22x+1)3(1)+1y = -3(x^2 - 2x + 1) -3(-1) + 1
y=3(x1)2+3+1y = -3(x - 1)^2 + 3 + 1
y=3(x1)2+4y = -3(x - 1)^2 + 4
Vertex: (1,4)(1, 4)
Axis of symmetry: x=1x = 1
(4) y=x24x+2y = -x^2 - 4x + 2
y=(x2+4x)+2y = -(x^2 + 4x) + 2
y=(x2+4x+4)(4)+2y = -(x^2 + 4x + 4) -(-4) + 2
y=(x+2)2+4+2y = -(x + 2)^2 + 4 + 2
y=(x+2)2+6y = -(x + 2)^2 + 6
Vertex: (2,6)(-2, 6)
Axis of symmetry: x=2x = -2

3. Final Answer

(1) Vertex: (3,4)(3, -4), Axis of symmetry: x=3x = 3
(2) Vertex: (2,5)(-2, -5), Axis of symmetry: x=2x = -2
(3) Vertex: (1,4)(1, 4), Axis of symmetry: x=1x = 1
(4) Vertex: (2,6)(-2, 6), Axis of symmetry: x=2x = -2

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