Quadratic Inequality?? ? ? 一元二次不等式
Solving Quadratic?Equations ? 解一元二次方程
Degree ? ? ? ? ? ? ? ? ?次數
Vertex ? ? ? ? ? ? ? ? ?頂點
Axis of Symmetry ? ? ? ? ? ?對稱軸
Transformation?? ? ? ? ? ?變換
Factor ? ? ? ? ? ? ? ? ? 因式、因子
Root ? ? ? ? ? ? ? ? ? ?根
A backyard farmer wants to enclose a rectangular space for a new garden. ?She has purchased 80 feet of wire fencing to enclose 3 sides, and will put the 4th?side against the backyard fence. ?Find a formula for the area enclosed by the fence if the sides of fencing perpendicular to the existing fence have length L.
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