Question

Justifique as igualdades.
a)√0,64 = 0,8

b) √$\frac{64}{225}$ = $\frac{8}{15}$

c) √2¹⁰ x 3² = 2⁵ x 3

d) √$\frac{1,69}{4}$ = $\frac{13}{20}$

Answer 1

Olá,

Justificativas:

a)

√0,64 = √(0,8)² = 0,8

0,8×0,8 = 0,64

b)

√64/225 = √64/√225 = 8/15

√64 = 8
√225 = 15

c)

√2¹⁰×3² = √2¹⁰ × √3² = 2⁵ × 3

d)

√1,69/4 = √169/400 = √169/√400 = 13/20

√169 = 13
√400 = 20