Question

sendo
A = (x³ - 2x² - 1x + 4)
B = (-2x³ + 5x² + 1x - 12)
C = (-3x² + 4x - 1)
calcule
A) A+B
B) A-B
C) B+C
D) A+B+C
E) A-B-C
) A-C

Answer 1

Explicação passo-a-passo:

a) x³-2x²-1x +4 -2x³+5x²+1x-12=

x³ -2x³ -2x²+5x² -1x +1x +4-12=

- 1x³ +3x²-8

b) x³-2x²-1x+4 - (-2x³ +5x²+1x-12)=

x³ -2x²-1x+4 +2x³ -5x²-1x+12=

x³+2x³ -2x²-5x² -1x-1x+4+12=

3x³ -7x² -2x +16

c)-2x³+5x²+1x-12 -3x²+4x-1=

-2x³ +5x²-3x² +1x +4x -12 -1=

-2x³ +2x² +5x -13

d)x³- 2x²-x+4-2x³+5x²+1x-12-3x²+4x-1=

x³-2x³-2x²+5x²-3x²-x+x+4x+4-12-1=

- 1x³ -5x²+5x² +4x-9=

-x³+4x-9

e)x³-2x²-x+4 +2x³-5x²-1x+12+3x²-4x+1=

x³+2x³-2x²-5x²+3x²-x-x-4x+4+12+1=

3x³-7x²+3x²-6x+17=

3x³-4x²-6x+17

f) x³-2x²-x+4 - (-3x²-4x+1)=

x³ -2x² -x +4 +3x²+4x-1=

x³ -2x²+3x² -x +4x+4-1=

x³ + x² +3x +3