Respostas

2014-06-26T20:56:29-03:00
A) x² = 15² + 20²
x² = 225 + 400
x = V625
x = 25

b) 9² = x² + 5²
81 = x² + 25
x² = 81 - 25
x = V56

c) (5V2)² = (3V2)² + x²
50 = 18 + x²
x² = 50 - 18
x = V32