Find all fixed points for the function by setting the function equal to x and solving the resulting equation for x.
-The area of a square lawn is numerically 140 feet more than the perimeter. Find the length of the side.
A) 56 feet
B) 392 feet
C) 98 feet
D) 14 feet

Question

Quizplus · Accepted Answer

Let the side length of the square be x feet. The area is x^2 and the perimeter is 4x. According to the problem, x^2 = 4x + 140. Solving x^2 - 4x - 140 = 0 using the quadratic formula gives x = 14 or x = -10. Since a side length cannot be negative, the side length is 14 feet.

Find All Fixed Points for the Function by Setting the Function