Question

Efetue a) (2x+6y)elevado a três

Answer 1

$(2x + 6y)^ 3 \\ \\ \\ (2x + 6y)*(2x + 6y)*(2x + 6y) \\ \\ (4x^2 + 24xy + 36) *(2x + 6y) \\ \\ \\ =\ \textgreater \ 8x^3 + 72x^2y + 216xy^2 + 216y^3$

Answer 2

(2x + 6y)³ = (2x + 6y)² . (2x + 6y)

(4x² + 2.2x.6y + 36y²) . ( 2x + 6y)
(4x² + 24xy + 36y²) . (2x + 6y)

8x³ + 24x²y + 48x²y + 144xy² + 72xy² + 216y³

8x³ + 72 x²y + 216 xy² + 216 y³