Question

Efetue as adições e subtrações de polinômios: a) (6x2+ 8x – 3) + (– 2x2– 5x – 1) b) (3m – 7) + (5m + 2) + (– 6m + 4) c) (4x3– 5x2– 2) – (+ 7 – 6x3) d) (h2– h – 1) – ( – h2+ h + 1)

Answer 1

a) (12 + 8x - 3) + (-4 -5x -1)

(9+8x) + (-5-5x)

9+8x-5-5x

4+3x

b) (3m-7)+(5m+2)+(-6m+4)

3m-7+5m+2-6m+4

4m-1

c) (4x3-5x2-2)-(+7-6x3)

(12-10-2)-(7-18)

0-7+18

11

d) (h2-h-1)-(-h2+h+1)

h-1-(-h+1)

h-1+h-1

2h-2

Answer 2

Oie, Td Bom?!

a)

$= (6x {}^{2} + 8x - 3) + ( - 2x {}^{2} - 5x - 1)$

$= 6x {}^{2} + 8x - 3 - 2x {}^{2} - 5x - 1$

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

b)

$= (3m - 7) + (5m + 2) + ( - 6m + 4)$

$= 3m - 7 + 5m + 2 - 6m + 4$

$= 2m - 1$

c)

$= (4x {}^{3} - 5x {}^{2} - 2) - (7 - 6x {}^{3} )$

$= 4x {}^{3} - 5x {}^{2} - 2 - 7 + 6x {}^{6}$

$= 10x {}^{3} - 5x {}^{2} - 9$

d)

$= (h {}^{2} - h - 1) - ( - h {}^{2} + h + 1)$

$= h {}^{2} - h - 1 + h {}^{2} - h - 1$

$= 2h {}^{2} - 2h - 2$

Att. Makaveli1996