Question

Gente me ajuda a fazer a questão 3

Answer 1

a) 2x - 9y ----------------->x = -1/4 e y = -1/3

2(-1/4) - 9(-1/3) =

-2/4 + 9/3 =

-1/2 + 3 = 5/2

b) x² + 2xy = ----------------> x = -1/3 e y = 1/4

(-1/3)² + 2(-1/3)(1/4) =

1/9 + 2(-1/12) =

1/9 - 2/12 =

1/9 - 1/6 = ¨¨¨¨¨¨¨mmc(6,9) = 18

2/18 - 3/18 = -1/18

c) 2x² - 4y + 8 = ----------------------> x = 2⁻² e y = 2⁻³

2(2⁻²)² - 4(2⁻³) + 8 =

2(2⁻⁴) - 4(1/2)³ + 8 =

2(1/2)⁴ - 4(1/8) + 8 =

2(1/16) - 4/8 + 8 =

2/16 - 4/8 + 8 =

1/8 - 4/8 + 8 =

- 3/8 + 8 =

61/8