Answer:
2x + 6
Step-by-step explanation:
The area of a square is the square of the side length:
A = s²
We know that the area of the square is 4x² + 24x + 36.
4 is 2², and 36 is 6². 24 is double 2 times 6.
Therefore, this is a perfect square trinomial:
A = 4x² + 24x + 36
A = (2x + 6)²
Therefore:
s = 2x + 6
