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Practice problem

Factoring Quadratic x²+bx+c Negative b

By Taylor Evans
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Suppose the area of a right-angled quadrilateral over time is described by A=4t2−40t+100A = 4t^2-40t+100, where tt is the current time.

(a) If the length of the area is determined by L=2t−10L = 2t-10, what is the shape of the quadrilateral?

(b) What if L=4t−20L = 4t-20?

Choose the most descriptive choices below for (a) and (b).

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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