Question

1 – Resolva as operações abaixo: (VALOR 2,0 PONTOS)
a) (y2 + 4y – 5) + (– 3y2 + 12y – 1) = b) x2 + 12x – 9 – ( -8x2 + 7x – 1) =

c) (3x+2).(2x+1) = d) (x+2).(x-1).(x+3) =

2 – Efetue as divisões abaixo : (VALOR 2,0 PONTOS)

a) (9x2y3 – 6x3y2 – xy) : (3x2y) = b) (36x3 – 18x2 + 3x) : (3x)

c) (108a3b2 + 48a2b2 – 18ab) : (9ab) = d) (205c3 – 45c3b + 80c2b2) : 5c2b

3 – Qual a solução da equação 3x + 5x - 19 = 45 - (VALOR 1,0 PONTO)

4 – Qual o polinômio que dividido por 5x2y2 resulta em 25xy – 625x2y2 ?
(VALOR 1,0 ponto)

Answer 1

Resposta:

a) (y2 + 4y – 5) + (– 3y2 + 12y – 1)

y2 + 4y -5 - 3y2 +12y - 1

y2 - 3y2 + 4y + 12y - 5 - 1

-2y2 +  16y - 6

b) x2 + 12x – 9 – ( -8x2 + 7x – 1)

x2 + 12x - 9 + 8x2 +7x - 1

x2 + 8x2 + 12x + 7x - 9 - 1

9x2 + 19x - 10

c) (3x+2).(2x+1)

(3x+2). (2x-1)

6x2 - 3x + 4x - 2

6X2 + X - 2

d) (x+2).(x-1).(x+3)

( − 1 ). ( + 3 ) + 2 ( − 1 ). ( + 3 )

( + 3 ) ⋅ 2 − ( + 3 ) + 2 ( − 1 ) ( + 3 )

3 + 3 2 − ( +3 ) + 2 ( − 1 ) ( + 3)

3 + 3 2 − ( 2 + 3 ) + 2 ( − 1 ) ( + 3 )

3 + 3 2 − 2 − 3 + 2 ( − 1 ) ( + 3 )

x3  +  4 x 2  +  x  −  6