Answer:
144
Step-by-step explanation:
Hello, please consider the following.
[tex]x^2-24x+c[/tex]
is a perfect square means that the discriminant is 0.
[tex]\Delta = b^2-4ac=24^2-4c=0\\\\<=>24^2-4c =0<=> 4c=576\\\\\text{We divide by 4}\\\\c= \dfrac{576}{4}=144[/tex]
Thank you
