Question

answer it fast

and answer it with process and send a pic or write the full answer and explain that how you did this

and try to answer my previous
questions also​

Answer 1

I don't know your previous question I will answer this one with explanation

Answer:

Step-by-step explanation:

5

a)

(9xy) + (12xy) + (10xy)

9xy + 12xy +10xy

(9 + 12 + 10)xy       (only to explain)

31xy

b)

(3x + 15) + (6x - 10)

3x + 6x + 15 - 10

9x + 5

c)

(2a + b - 3) + (2b - a + 4) + (2a - b + 4)

(2a + 2a - a) + (b + 2b - b) + (4 + 4 - 3)

(4a - a) + (3b - b) + (8 - 3)

3a + 2b + 5

d)

(10x + 14y - 15xy - 12) + (16 - 2x - 8y + 9xy + 6xy)

(10x - 2x) + (14y - 8y) + (9xy + 6xy - 15xy) - 12

8x + 6y + 0 - 12

8x + 6y - 12

6.

a)

-2x² from 10x²

(10x²) - (-2x²)

10x² + 2x² (minus + minus = plus)

12x²

b)

(7xy + 2) from (15xy - 4)

(15xy - 4) - (7xy + 2)

15xy - 4 - 7xy - 2

15xy - 7xy - 4 - 2

8xy - 6

c)

(-x² + 6xy) from (4x² - 2xy + 8)

(4x² - 2xy + 8) - (-x² + 6xy)

4x² - 2xy + 8 + x² + 6xy

5x² + 4xy + 8

d)

(6ab - b² - 2a²) from (8a² + 6b² - ab)

(8a² +6b² - ab) - (6ab - b² - 2a²)

8a² + 6b² - ab - 6ab + b² + 2a²

10a² + 7b² - 7ab

7.

a)

let the number added be x

x + 2x² + xy - 7y² = 8x² + 8xy

x = (8x² + 8xy) - (2x² + xy - 7y²)

x = 8x² - 2x² + 8xy - xy + 7y²

x = 6x² + 7xy + 7y²

So the number is 6x² + 7xy + 7y²

I would be happy if you mark me brainliest

If you have any doubt just friend me and ask me

Have a nice day

:)