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Mashutka [201]
2 years ago
9

Find the perimeter of the triangle.​

Mathematics
1 answer:
PtichkaEL [24]2 years ago
7 0

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

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