Problem
3 marks) 6. The area of a square is $49-28 x+4 x^{2}$ square units, where $x$ represents a positive integer. Write the possible expression for the perimeter of the square. HINT: You will need to find the side length first, and then calculate the perimeter. Area $=$ $49-28 x+4 x^{2}$
Solution
Step 1 ：Area = \(49 - 28x + 4x^2\)
Step 2 ：Side Length = \(\sqrt{49 - 28x + 4x^2}\)
Step 3 ：\(\boxed{Perimeter = 4\sqrt{49 - 28x + 4x^2}}\)
