Question

Determine o valor numérico de p(x) = 3x 4 – 4x³ + 2x² + 6x – 8, para x = 2.

Answer 1

Oie, Td Bom?!

$p(x) = 3x {}^{4} - 4x {}^{3} + 2x {}^{2} + 6x - 8$

$p(2) = 3 \: . \: 2 {}^{4} - 4 \: . \: 2 {}^{3} + 2 \: . \: 2 {}^{2} + 6 \: . \: 2 - 8$

$p(2) = 3 \: . \: 16 - 4 \: . \: 8 + 2 \: . \: 4 + 6 \: . \: 2 - 8$

$p(2) = 48 - 32 + 8 + 6 \: . \: 2 - 8$

$p(2) = 48 - 32 + 6 \: . \: 2$

$p(2 ) = 48 - 32 + 12$

$p(2) = 60 - 32$

$p(2) = 28$

Att. Makaveli1996