Answer: The value of c must be 36 to make it perfect square trinomial.
Explanation:
A standard perfect square trinomial is [tex]x^2+2ax+a^2=(x+a)^2[/tex] where [tex]a^2[/tex] is the constant term.
Given trinomial [tex]x^2-12x+c=x^2+2(-6)a+c[/tex]
On comparing with standard perfect square trinomial we get a=-6
Therefore the constant term c=[tex]a^2=(-6)^2=36[/tex]
Such that the trinomial becomes [tex]x^2-12x+36=x^2+2(-6)x+(-6)^2=(x-6)^2[/tex] a perfect square trinomial.
Hence the value of c for the given trinomial must be 36 to make it perfect square trinomial.
