Question

Add:

(i) 3mn , -5mn , 8mn , -4mn
(ii) -7mn + 5 , 12mn + 2 , 9mn - 8 , -2mn - 3
(iii) 5m - 7n , 3n - 4m + 2 , 2m - 3mn - 5
(iv) 4x²y , -3xy² , -5xy² , 5x²y

Answer 1

Step-by-step explanation:

1. 3mn+8mn-5mn-4mn

11mn-9mn

2mn

2.-7mn+5+12mn+2+9mn-8-2mn-3

5mn+7+7mn-11

12mn-4mn

Answer 2

Step-by-step explanation:

(1)

3mn, -5mn, 8mn, -4mn

=> 3mn - 5mn + 8mn - 4mn

=> -2mn + 8mn - 4mn

=> -6mn + 8mn

=> 2mn

(ii)

-7mn + 5 , 12mn + 2 , 9mn - 8 , -2mn - 3

=> -7mn + 5 + 12mn + 2 + 9mn - 8 - 2mn - 3

=> 12mn + 5 + 2 - 8 - 3

=> 12mn - 4

(iii)

5m - 7n , 3n - 4m + 2 , 2m - 3mn - 5

=> 5m - 7n + 3n - 4m + 2 + 2m - 3mn - 5

=> -3mn + 3m - 4n + 2 - 5

=> 3m - 3mn - 4n -

(iv)

4x²y , -3xy² , -5xy² , 5x²y

=> 4x²y - 3xy² - 5xy² + 5x²y

=> 9x²y - 3xy² - 5xy²

=> 9x²y - 8xy²

#Hope my answer help you.