Question

find the perimeter of square whose side is (3x+5)cm

Answer 1

$\huge \underline\bold\green{Answer}$

Area of a square: side length*side length = (3x+5)(3x+5)

After the foiling method, you'll find the area is 9x2 + 30x + 25

Perimeter of a square: 4*side length (because all the sides are of equal length) = 4(3x+5) = 12x + 20

Finally you'll need to subtract the perimeter from the area, so 9x2 + 30x + 25 - 12x - 20 = 9x2 + 18x + 5 (the final answer)

Answer 2

Answer:

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Area of a square: side length*side length = (3x+5)(3x+5)

After the foiling method, you'll find the area is 9x2 + 30x + 25

Perimeter of a square: 4*side length (because all the sides are of equal length) = 4(3x+5) = 12x + 20

Finally you'll need to subtract the perimeter from the area, so 9x2 + 30x + 25 - 12x - 20 = 9x2 + 18x + 5 (the final answer)