Question

Add:
(5x² + 7y - 6z²), (4y + 3x², 9x² + 2z² - 9y) and (2y - 2x²)

Answer 1

Answer:

ugdyd7tu0jkcyd7y0ioifdug0uhv

Answer 2

Answer:

Step-by-step explanation:

Add: 6a + 8b - 7c, 2b + c - 4a and a - 3b - 2c

Solution:  

Horizontal Method:

(6a + 8b - 7c) + (2b + c - 4a) + (a - 3b - 2c)  

= 6a + 8b - 7c + 2b + c - 4a + a - 3b - 2c

Arrange the like terms together, then add.  

Thus, the required addition

= 6a - 4a + a + 8b + 2b - 3b - 7c + c - 2c

= 3a + 7b - 8c

Column Method:

Solution:

Writing the terms of the given expressions in the same order in form of rows with like terms below each other and adding column wise;

   6a + 8b - 7c

- 4a + 2b +  c

    a - 3b - 2c

  3a + 7b - 8c

 = 3a + 7b - 8c

2. Add: 5x² + 7y - 8, 4y + 7 - 2x² and 6 – 5y + 4x².

Solution:

Writing the given expressions in descending powers of x in the form of rows with like terms below each other and adding column wise;

   5x² + 7y - 8

- 2x² + 4y + 7

  4x² – 5y + 6

  ___________

  7x² + 6y + 5

  ___________

= 7x² + 6y + 5