Question

Sabendo que x = -9, y = 8 e z = 17, qual o valor da expressao

x² - y²/ z-¹

Answer 1

Resposta:

$\text{\sf Leia abaixo}$

Explicação passo-a-passo:

$\sf k= \dfrac{x^2 - y^2}{z^{-1}}$

$\sf k = \dfrac{(-9)^2 - (8)^2}{(17)^{-1}}$

$\sf k = \dfrac{81 - 64}{(17)^{-1}}$

$\sf k = \dfrac{17}{(17)^{-1}}$

$\sf k = 17^2$

$\boxed{\boxed{\sf k = 289}}$

Answer 2

Oie, Td Bom?!

$= \frac{x {}^{2} - y {}^{2} }{z {}^{ - 1} }$

$= \frac{( - 9) {}^{2} - 8 {}^{2} }{17 {}^{ - 1} }$

$= \frac{81 - 64}{17 {}^{ - 1} }$

$= \frac{17}{17 {}^{ - 1} }$

$= 17 {}^{1 - ( - 1)}$

$= 17 {}^{1 + 1}$

$= 17 {}^{2}$

$= 17 \: . \: 17$

$= 289$

Att. Makaveli1996