Add:

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

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Solution

Step-1: Combining like terms and adding
= -7mn + 12mn + 9mn - 2mn + 5 + 2 - 8 - 3 ( 1 mark)
Step-2: = (-7 + 12 + 9 - 2)mn + 7 - 11
= 12mn - 4 ( 1 mark)

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Similar questions

Question 2 (iii)

Add:

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

Question 60 (b)

What should be subtracted from $- 7 m n + 2 m^{2} + 3 n^{2}$ to get $m^{2} + 2 m n + n^{2} ?$

l^{2} + m^{2}, m^{2} + n^{2}, n^{2} + l^{2} + 2 l m + 2 m n + 2 n l

Add the following:

$- 7 m n, 5, 12 m n, - 2, 9 m n, 8$

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