Question

(3x^2 + 5x) . (X^2 + 3x) ajudem me​

Answer 1

Oie, Td Bom?!

$= (3x {}^{2} + 5x) \: . \: (x {}^{2} + 3x)$

$= 3x {}^{2} \: . \: (x {}^{2} + 3x) + 5x \: . \: (x {}^{2} + 3x)$

$= 3x {}^{4} + 9x {}^{3} + 5x {}^{3} + 15x {}^{2}$

$= 3x {}^{4} + 14x {}^{3} + 15x {}^{2}$

Att. Makaveli1996