Question

Se √x = 6,5 então o valor de x é: a) 6,5 b) 3,25 c) 13,0 d) 42,25

Answer 1

Resposta:

d) 42,25

$x = 6.5 {}^{2}$

$x = (\frac{13}{2}) {}^{2}$

$x = \frac{169}{4}$

$\sqrt{ \frac{169}{4} } = 6.5$

$\frac{13}{2} = \frac{13}{2}$

$x = \frac{169}{4}$

$x = 42.25$