Question

Calcule:
a) (-28x(4ao cubo)y) : (-4xy)
b) (-2x(3ao cubo)y) . (-3xy (2ao quadrado) . xy=

Answer 1

Calcule:

a) (-28x(4ao cubo)y) : (-4xy)

(-28x³y)

-------------

(-4xy)

(-4xy)(7x²)

-------------------- elimina AMBOS (-4xy)

(-4xy)

(7x²) resposta

b) (-2x(3ao cubo)y) . (-3xy (2ao quadrado) . xy=

(-2x³y)(-3xy²)(xy)

(-2)(-3)x³y.xy².xy

+ 6x³xxyy²y

+ 6x⁵y⁴ ( resposta)

Answer 2

$a)~-28x^{3}y:-4xy=\frac{-28.x.x.x.y}{-4.x.y}= \frac{7.x.x.y}{y} =[tex] 7x^{2}$ [/tex]

$b)~ -(2x^{3}y) .(-3xy^{2}).(xy )=\\ \\ (-2x^{3} y)~.~(-3xy^{2})=+6x^{4}y^{3} \\\\+6x^{4}y^{3} ~.~xy=6x^{5}y^{4}$