This is Ax2 + Bx + C = 0, where A is a natural number.

when simplified:

If you need polynominal by degree let me know in the comment and I'll give you the answer and how to do it if needed.

So I figured it' not easy to understand on with text so instead of typing it all out here I took a picture of how to do it so Click to get full view. So it's easier to understand.

Hope this helps

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi