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11. The area of a square is x² + 6x + 9 square units. Which expression represents the length of the side? A. (x + 2) units B. (x + 3) units C. (x + 9) units D. (x - 3) units
11. The area of a square is x² + 6x + 9 square units. Which expression represents the length of the side? A. (x + 2) units B. (x + 3) units C. (x + 9) units D. (x - 3) units
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Answer:
b. (x+3) units
Step-by-step explanation:
The length of the side is the square root of the area.
The square root of x^2 + 6x + 9 = x +3.
The expression x + 3 represents the length of the side.
CHECK: A = (x + 3)(x + 3) = x^2 + 3x + 3x +9 = x^2 + 6x + 9
Answer:
B. (x +3)
Step-by-step explanation:
Area of square is = S²
Factor the equation
x²+6x+9=0
(x+3)²
s=x+3
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