Question

Preciso do calculo da letra b) e d)

Answer 1

Na ordem
b), d)
               $(-5xy.).(-y)^2+(-3y)^3.(2x) \\ \\ =5xy(y)^2+(-27y^3)(2x) \\ \\ =5xy^3-54xy^3 \\ \\= -49xy^3 \\ \\ \\ ( \frac{2a^4y^2}{3} )^3:( \frac{4a^5y^3}{6} )^2 \\ \\ = \frac{8 a^{12}y^6 }{27} : \frac{16 a^{10}y^6 }{36} \\ \\ = \frac{36(8 a^{12}y^6) }{27(16 a^{10}y^6 )} \\ \\ = \frac{2 a^{12-10} y^{6-6} }{3} \\ \\ =\frac{2a^2}{3}$

Answer 2

(-5xy) * (-y)² + (-3y)³ * (-2x)
(-5xy) * (-y)² + 27y³ * (-2x) 
5xy³ - 54xy³
-49xy³