Question

Candy draws a square design with a side length of x inches for the window at the pet shop. She takes the design to the printer and asks for a sign that has an area of 16x2 – 40x + 25 square inches.

Answer 1

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Given: Candy draws a square design with a side length of x inches for the window at the pet shop.  

She takes the design to the printer and asks for a sign that has an area of 16x^2-40x+25square inches.  

Let y(x) =16x^2-40x+25

differentiating both sides w.r.t x we get

y'(x)=32x-40

to find critical point x ,Put y'(x)=0 then

⇒32x-40=0

⇒x=5/4

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Answer 2

Answer:

4x-5

Step-by-step explanation: