Tag Archives: quadratic

129 – finding the border of a picture frame

My algebra kids are learning to write a quadratic equation to help them solve this problem from mathisfun.com: But first I made them figure it out by physically cutting a 28-cm2 frame to evenly surround a 6-cm by 11-cm picture. I blogged about it here.

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121 – graphing quadratic functions

Algebra students used Desmos today to see how the coefficients a, b, and c affect the shape of the parabola.

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