Question

Ajude como resolver?

Answer 1

a) $\left(\dfrac{2}{3}bs^3+\dfrac{5}{4}a^2\right)^3=\dfrac{8}{27}b^3s^9+\dfrac{5}{3}b^2s^6a^2+\dfrac{25}{8}bs^3a^4+\dfrac{125}{64}a^6$.

b)

$(7xy-6m^3n^2)(7xy+6m^3n^2)=(7xy)^2-(6m^3n^2)^2=49x^2y^2-36m^6n^4$

c) $\left(x^3+\dfrac{2}{3}y\right)^2=x^6+\dfrac{4}{3}x^3y+\dfrac{4}{9}y^2$

d) $(7y^2+3y^4)^2=49y^4+42y^6+9y^{8}$.