Question

which value is needed in the expression below to create a perfect square trinomial?
$x^2 + 8x + \underline{\quad}$
options: 64, 8, 16

Explanation:

Step1: Identify linear term coefficient

The linear term is $8x$, so its coefficient is $8$.

Step2: Half the coefficient

$\frac{8}{2}=4$

Step3: Square the result

$4^2=16$

Answer:

16