Question

2)Escreva a forma irredutível das expressões a seguir

a)3(2×+4) - 3x-9x - 18

b)7(4y-3x)-10x-9y

c)5(2z-2)+3y-3+7x
​

Answer 1

Resposta:
a) -6x -6
b) 19y- 31x
c) 10z - 13 + 3y + 7x

passo a passo:
a)3(2×+4) - 3x-9x - 18
6x + 12 - 3x - 9x -18
-6x -6

b)7(4y-3x)-10x-9y
28y - 21x - 10x - 9y
19y- 31x

c)5(2z-2)+3y-3+7x
10z - 10 + 3y - 3 + 7x
10z - 13 + 3y + 7x

Answer 2

Resposta:

A)-6x-6

B)19y-31x

C)10z-13+3y+7y

Explicação passo-a-passo:

A)3(2x+4)-3x-9x-18

3(2x+4)-3x-9x-18

3(2x+4)

3×2x+3×4

6x+3×4

3×2x+3×4

6x+12

3(2x+14)-3x-9x-18

6x+12-3x-9x-18

6x-3x-9x

(6-3-9)x

-6x

6x+12-3x-9x-18

-6x+12-18

6x+12-3x-9x-18

12-18

-(18-12)

-6

6x+12-3x-9x-18

-6x-6

Resposta

-6x-6

B)7(4y-3x)-10x-9y

7(4y-3x)-10x-9y

7(4y-3y)

7×4y-7×3x

28-7×3y

7×4y-7×3x

28y-21x

7(4y-3x)-10x-9y

28y-21x-10x-9y

28y-9y

(28-9)y

19y

28y-21y-10x-9y

19y-21y-10x

28y-21y-10x-9y

-21y-10x

(-21-10)x

-31y

28y-21x-10x-9y

19y-31x

Resposta

19y-31x

C)5(2z-2)+3y-3+7x

5(2z-2)+3y-3+7x

5(2z-2)

5×2z-5×2

10z-5×2

5×2z-5×2

10z-10

5(2z-2)+3y-3+7x

10z-10+3y-3+7x

-10-3

-(10+3)

-13

10z-10+3y-3+7x

10z-13+3y+7x

Resposta

10z-13+3y+7x