Respuesta :

rendhomework

Answer:

14.04

Step-by-step explanation:

[tex]19^{2}[/tex] - [tex]17^{2}[/tex] = 72

[tex]\sqrt{72}[/tex] = 8.48

8.48 + 8.48 = 16.96

31 - 16.96 = 14.04

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