Question

Calcule as adições algébricas.
a) 5m – (2m – 6m – 8m) =
b) 5a – 3b – (6a + a – 5b) =

Answer 1

Resposta:

a) 5m – (2m – 6m – 8m) = 60m²

b) 5a – 3b – (6a + a – 5b) = 23a + 3ab - 15b²

Explicação passo-a-passo:

a) 5m – (2m – 6m – 8m) =

- ( 10m² - 30m² - 40 m² )

- 10m² + 30m² + 40m²

+ 20m² + 40m²

+ 60m²

b) 5a – 3b – (6a + a – 5b) =

5a - ( - 18a - 3ab + 15b²)

5a + 18a + 3ab - 15b²

23a + 3ab - 15b²