Let f(x)= x^2-4x-c. Find a nonzero value of c such that f(c)=c.

The nonzero value of c will be:

Step-by-step explanation:

Given the function

as

so

switching the sides

subtract c from both sides

Using the zero factor principle

so, the solutions to the quadratic equations are:

Therefore, a nonzero value of c will be:

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

step-by-step explanation: