Question

BIG POINT, BIG POINT, BIG POINT!

Algebra

1. 13a - 8b) + (21a + 9b) = ...
2. (15i - 14j + 13k) + (-30i - 45j + 51k) = ...
3. (3x - 17y + 35z) + (4x + 23y- 9z ) = ...
4. (42n + 35m + 7) - (-50m - 20n +9) = ...
5. (5x + 3) - (x - 1) =...
6. (2y + 15z) - (4y - 8) = ...
7. 5z + 3 - 2z - 7 = ...
8. 6x + 4 - x - y = ...
9. (5x - 9) - (7x + 15y) = ...
10. (5y - 3x - 4) - (5x - 3y + 7) = ...
11. (5x² - 9xy - 4y² - (-x² - 6xy - 3y²) = ...

must correct ✓
no wrong ✓
use explain ✓
use English ✓
wrong > report & got a warning ​

Answer 1

Verified answer

Jawaban:

For algebraic addition and subtraction operations like this, the first thing you have to do is pay attention to the variables, put the same variables close together, then pay attention to the sign of the number.

Penjelasan dengan langkah-langkah:

Now let's do it!

1. 13a + 21a - 8b + 9b => 33a + b

2. 15i - 30i - 14j - 45 j + 13k + 51k

-15i - 59j + 64k

3. 3x + 4x - 17y + 23y + 35z - 9z

7x + 6y + 26z

4. 42n + 20n + 35m + 50m + 7 - 9

62n + 85m - 2

5. 5x - x + 3 + 1 => 4x + 4

6. 2y - 4y + 15z + 8

-2y + 15z + 8

7. 5z - 2z + 3 - 7 => 3z - 4

8. 6x - x - y + 4

5x - y + 4

9. 5x - 7x - 15y - 9

-2x - 15y - 9

10. 5y + 3y - 3x - 5x - 4 - 7

8y - 8x - 11

11. 5x² + x² - 4y² + 3y² - 9xy + 6xy

6x² - y² - 3xy

Hopefully this can be helpful and useful