Bellwork: 2/23/15 1. Graph y = x2 + 4x + 3.

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Presentation transcript:

Bellwork: 2/23/15 1. Graph y = x2 + 4x + 3. 2. Identify the axis of symmetry, vertex, y-intercept, and zeros of the function above.

Information about Quadratics

Bellwork: 2/24/15 Identify the axis of symmetry, the vertex, and if the graph is opening upwards or downwards: 1)y= -x2+4x-5 2) y= 3x2-18x+5

Quadratic Functions We will... solve quadratic equations by graphing.

quadratic equation ax2 + bx + c = 0 y = ax2 + bx + c 0 = ax2 + bx + c

Solve the equation by graphing the related function. 2x2 – 18 = 0 –12x + 18 = –2x2

Solve the equation by graphing the related function. 1) 2x2 + 4x = –3 2) x2 – 8x – 16 = 2x2 3) 6x + 10 = –x2 4) –x2 + 4 = 0 5) x 2 - 4 = 0 6) -x2 + 12x - 36 = 0 7) 2x2 = 3x2 - 2x - 8 8) -2x2 - 6 = 0

1) x 2 - 4 = 0 2) -x2 + 12x - 36 = 0 3) 2x2 = 3x2 - 2x - 8 4) -2x2 - 6 = 0

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