The area of a square garden is Q square feet and the perimeter is P feet. If Q=P+21, what is the perimeter of the garden in feet? Answers.
A) 24 B) 28 C) 32 D) 36 E) 40
Let x be the length of one side of the square garden.   x^2 = 4x + 21   x^2 - 4x - 21 = 0   (x-7)(x+3) = 0   x = 7, -3   P = 4(7) = 28   The answer is 28.
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The area of a square garden is Q square feet and the perimeter is P feet. If Q=P+21, what is the perimeter of the garden in feet?