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The length of a side of a square is (2x + 9) km. Find the area of the square in terms of the variable x.

The length of a side of a square is (2x + 9) km. Find the area of the square in terms of the variable x.
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10 votes
The length of a side of a square is (2x + 9) km. Find the area of the square in terms of the variable x.

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User Ye Win
by
8.0k points

1 Answer

5 votes
(2x + 9)^2
= 2x(2x + 9) + 9(2x + 9)
= 4x^2 + 36x + 81

answered
User Minimi
by
8.0k points
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