Question

7– Determine a forma reduzida dos polinômios abaixo:

a) y2 + 4y – 5 – 3y2 + 12y – 1
d) 2x2 + 4x – 2x2 + x – 6

b) x2 + 12x – 9 – 8x2 + 7x – 1
e) – 5xy – 11x + 3 + 4xy +10x – 2

c) 3x3 + 2x + 1 – 2x3 + x – 4
f) 6xyz + 8z – xyz – 8z

me ajudem pfvr​

Answer 1

Oie, Td Bom?!

a)

$= y {}^{2} + 4y - 5 - 3y {}^{2} + 12y - 1$

$= - 2y {}^{2} + 4y - 5 + 12y - 1$

$= - 2y {}^{2} + 16y - 5 - 1$

$= - 2y {}^{2} + 16y - 6$

b)

$= x {}^{2} + 12x - 9 - 8x {}^{2} + 7x - 1$

$= - 7x {}^{2} + 12x - 9 + 7x - 1$

$= - 7x {}^{2} + 19x - 9 - 1$

$= - 7x {}^{2} + 19x - 10$

c)

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

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

$= x {}^{3} + 3x + 1 - 4$

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

d)

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

$= 4x + x - 6$

$= 5x - 6$

e)

$= - 5xy - 11x + 3 + 4xy + 10x - 2$

$= - xy - 11x + 3 + 10x - 2$

$= - xy - x + 3 - 2$

$= - xy - x + 1$

f)

$= 6xyz + 8z - xyz - 8z$

$= 6xyz - xyz$

$= 5xyz$

Att. Makaveli1996

Answer 2

Vamos lá !!

• Letra A

${y}^{2} + 4y - 5 - 3 {y}^{2} + 12y - 1$

${y}^{2} - 3 {y}^{2} + 4y + 12y - 5 - 1$

$\boxed{\boxed{ \red{- 2 {y}^{2} + 16y - 6}}}$

• Letra B

${x}^{2} + 12x - 9 - 8 {x}^{2} + 7x - 1$

${x}^{2} - 8 {x}^{2} + 12x + 7x - 9 - 1$

$\boxed{\boxed{ \red{- 7 {x}^{2} + 19x - 10}}}$

• Letra C

${3x}^{3} + 2x + 1 - {2x}^{3} + x - 4$

${3x}^{3} - {2x}^{3} + 2x + x - 4 + 1$

$\boxed{\boxed{\red{ {x}^{3} + 3x - 3}}}$

• Letra D

${2x}^{2} + 4x - {2x}^{2} + x - 6$

$2 {x}^{2} - {2x}^{2} + 4x + x - 6$

$\boxed{\boxed{ \red{+ 5x - 6}}}$

• Letra E

$- 5xy - 11x + 3 + 4xy + 10x - 2$

$- 5xy + 4xy - 11x + 10x + 3 - 2$

$\boxed{\boxed{ \red{- xy - x + 1}}}$

• Letra F

$6xyz + 8z - xyz - 8z$

$6xyz - xyz + 8z - 8z$

$\boxed{\boxed{\red{\red{5xyz}}}}$

Bons estudos .