Question

Ajudem Por favor 15 pontos
CALCULE:
a) 6a-3a+2a
b) -2y²-7y²+5y²
c) 3/4 XY - 1/4 xy =

Answer 1

Vamos lá..

a) 6a - 3a + 2a
3a + 2a
5a

b) -2y² - 7y² + 5y²
- 9y² + 5y²
- 4y²

c) $\frac{3}{4}xy - \frac{1}{4}xy$

$\frac{3}{4}xy - \frac{1}{4}xy = \frac{2}{4}xy$

$\frac{2}{4}xy : \frac{2}{4} = \frac{1}{2}xy$

:)

Answer 2

a) 5a
b)-9y^4+5y^2=4y^6
c) 2/4