What is the value of c such that x^2-20x+c is a perfect-square trinomial?

c=100

Step-by-step explanation:

To complete the square, it would really help if the coefficient of x^2 is 1 which is so formula for c in this case is just (b/2)^2

So (-20/2)^2

simplifying gives

(-10)^2

100

c=100

100

Step-by-step explanation:

The question is on making the equation a perfect square

Given ;

To get c;

where ;

there are infinitely many solutions.