Question

Dados os polinômios A=(5x2-4x+7) , B=(3x2+7x-1) e C= (5x4 – 2x2 + 3x –1),
calcule:

a) A+C b) A - B

Answer 1

Oie, Td Bom?!

a)

$= A + C$

$= (5x {}^{2} - 4x +7) + (5x {}^{4} - 2x {}^{2} + 3x - 1)$

$= 5x {}^{2} - 4x +7 + 5x {}^{4} - 2x {}^{2} + 3x - 1$

$= 3x {}^{2} - 4x + 7 + 5x {}^{4} + 3x - 1$

$= 3x {}^{2} - x + 7 + 5x {}^{4} - 1$

$= 3x {}^{2} - x + 6 + 5x {}^{4}$

$= 5x {}^{4} + 3x {}^{2} - x + 6$

b)

$= A - B$

$= (5x {}^{2} - 4x + 7) - (3x {}^{2} + 7x - 1)$

$= 5x { }^{2} - 4x + 7 - 3x {}^{2} - 7x + 1$

$= 2x {}^{2} - 4x + 7 - 7x + 1$

$= 2x {}^{2} - 11x + 7 + 1$

$= 2x { }^{2} - 11x + 8$

Att. Makaveli1996