Question

what value of c makes the quadratic expression ( x^2 + 6x + c ) a perfect square trinomial? use the keypad to enter your answer in the box. additional symbols can be found using the drop - down arrows at the top of the keypad. ( c=square )

Explanation:

Step1: Identify linear coefficient

The linear term is $6x$, so coefficient is $6$.

Step2: Half the linear coefficient

$\frac{6}{2} = 3$

Step3: Square the result

$3^2 = 9$

Answer:

$9$