Question

e) (a - b)² - c², quando a = 2/3, b = 1 e c = -1.

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{(a - b)^2 - c^2}$

$\mathsf{a = \dfrac{2}{3}};\mathsf{b = 1};\mathsf{c = -1}$

$\mathsf{\left(\dfrac{2}{3} - 1\right)^2 - (-1)^2}$

$\mathsf{\left(\dfrac{2-3}{3}\right)^2 - (1)}$

$\mathsf{\left(-\dfrac{1}{3}\right)^2 - (1)}$

$\mathsf{\left(\dfrac{1}{9} - 1\right)}$

$\mathsf{\left(\dfrac{1 - 9}{9}\right)}$

$\boxed{\boxed{\mathsf{-\dfrac{8}{9}}}}$

Answer 2

Olá!!!

Resposta...

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= ( a - b )² - c² /// a = 2/3 /// b = 1 /// c = -1.

= ( 2/3 -1 )² - ( -1 )²

= ( 2 - 3/3 )² - (1)

= ( - 1/3 )² - (1)

= ( 1/9 - 1 )

= ( 1 - 9/9 )

= - 8/9