Question

efetue as adição algébrica a) (- 3 x) +( - 8x) b) (+5ab) -(-7ab) c)(+2xy) + (+13xy)​

Answer 1

Resposta:

a) (- 3 x) +( - 8x)

$- 3x - 8x \\ = - 11x$

b) (+5ab) -(-7ab)

$5ab + 7ab \\ = 12ab$

c)(+2xy) + (+13xy)

$2xy + 13xy \\ = 15xy$