Answers needed.

Question

The surface area of the box of cereal displayed is 2x^2+48x+88.

What is the value of xif the box of cereal has a total surface area of 192 in2?

Answer 1

2x^2 + 48x + 88 = 192

x^2 + 24x + 44 = 96

x^2 + 24x + 144 = 96-44 + 144 = 196

(x+12)^2 = 196

x + 12 = sqr196 = 14

x = 14-12 = 2

x=2