Question

value: 5
what number will make this expression a perfect s
$x^2 + 8x + \underline{\quad}$
a. 13
b. 16
c. 21
d. 14

Explanation:

Step1: Identify linear term coefficient

Linear term coefficient: $8$

Step2: Half the coefficient

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

Step3: Square the result

$4^2=16$

Answer:

b. 16