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Find the perimeter of the triangle.​
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Find the perimeter of the triangle.​

Find the perimeter of the triangle.​-example-1
User Njh
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Answer:

Perimeter of the Triangle


( {x}^(2) - 5x + 13) + (2 {x}^(2) - x + 19) + ( {x}^(2) + 3x + 21) \\ =(1 + 2 + 1) {x}^(2) + ( - 5 - 1 + 3)x + (13 + 19 + 21) \\ =(4 {x}^(2) - 3x + 53) \: units

User Francesco Orsi
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