Question

ajutați-mă va rog repede ​

Answer 1

a) x = V1 = ±1

x² = 81

x = V81 = ± 9

x² = 1/4

x = V1/4 = ± 1/2

b) x² = 75/3

x² = 25

x =V25 = ±5

x² = 121/49

x = V121/49  = ±11/7

x² = 225/25

x = V225/25  = ±15/5 = ±3

c) x² = 0,25

x = V25/100 = ± 5/10  = ± 1/2

2x² = 32/100

x² = 32/100 * 1/2

x = V16/100 = ± 4/10 = ± 2/5

x² = 4/100 * 1/4

x = V1/100  = ±1/10