Respuesta :

karkismriti176

Answer:

8

Step-by-step explanation:

h²= p²+ b²

or, (9+x)² = 15²+x²

or, 81 + 18x + x² = 225 +x²

or, 18x = 225-81

or, 18x = 144

or, x= 144/18

x= 8

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