Respuesta :

Hrishii

Answer:

20

Step-by-step explanation:

[tex]x = \sqrt{ {29}^{2} - {21}^{2} } \\ = \sqrt{841 - 441} \\ = \sqrt{400} \\ = 20[/tex]

zahratahir2629
Answer equals 20 because the square root of 400 is 20

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