Question

The square above has an area of

16 + 8x + x² square meters.

What expression represents the length of one side of the square?​

Answer 1

One side is -4.
It can also be x + 4.

Turn 16 + 8x + x^2 into standard form —> x^2 + 8x + 16
Note: standard form is ax^2 + bx + c

Use the “foil” method to factor.
(x + 4)(x + 4)
x=-4