Question

Calcule os produtos (x²+3x).(x⁷‐3)

Answer 1

Oie, Td Bom?!

$= (x {}^{2} + 3x) \: . \: (x {}^{7} - 3)$

$= x {}^{2} \: . \: (x {}^{7} - 3) + 3x \: . \: (x {}^{7} - 3)$

$= x {}^{9} - 3x {}^{2} + 3x {}^{8} - 9x$

Att. Makaveli1996