Question

(-√28i/2)·(√28i/2) = ?

Answer 1

Resposta: 7

Explicação passo-a-passo:

Podemos reescrever a expressao assim:

- ($\sqrt{28}$ i)( $\sqrt{28}$ i) / 2.2 = - 28 i²/4 = - 28 . (-1) / 4 = 7

obs.: i² = -1

Answer 2

Oie, Td Bom?!

$( - \frac{ \sqrt{28}i }{2} ) \: . \: \frac{ \sqrt{28}i }{2}$

$- \frac{ \sqrt{28}i }{2} \: . \: \frac{ \sqrt{28}i }{2}$

$- \frac{2 \sqrt{7} i}{2} \: . \: \frac{2 \sqrt{7}i }{2}$

$- \sqrt{7} i \sqrt{7} i$

$- 7i \: . \: i$

$- 7i {}^{2}$

• $⟶i {}^{2} = - 1$

$- 7 \: . \: ( - 1)$

$7 \: . \: 1$

$7$

Att. Makaveli1996