If the side of a square is reduced by 2 dm, and the second by 4 dm, then the area of the resulting
| December 26, 2020 | education
If the side of a square is reduced by 2 dm, and the second by 4 dm, then the area of the resulting rectangle will be 120 square dm, find the side of the square.
X is the side of the square, then (x-2) * (x-4) = 120
x ^ 2-6x-112 = 0
D = 36 + 448 = 484
X = 14, second root does not fit
Then the area of the original square is 196
Answer: 14
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