Question

add 2a2b +5b2a+7 , 3a2b- 2b2a+6, 8a2b-b2a+9​

Answer 1

Answer:(2a2b+5b2a+7) + (3a2b-2b2a+6) + (8a2b-b2a+9)

Step-by-step explanation:

Combine all like terms in one bracket-

[2a2b+(-2a2b)+8a2b] + [5b2a+(-2b2a)+(-b2a)] + [7+6+9]

[2a2b+8a2b+(-2a2b)] + [5b2a+(-2b2a)+(-b2a)] + [7+6+9]

In first bracket 1 term is positive that is 2a2b but the last term is negative that is -2a2b so these two terms will cut out as they are same but with different signs

So it will be left 8a2b

In next bracket + sign between two terms will change into - as the terms inside brackets are negative-

so we will be left out with [5b2a-2b2a-b2a]

Now it is simplify time-

so-

8a2b + [5b2a-2b2a-b2a]+[7+6+9]

So now -  - = + ,

-2b2a+(-b2a) = 3b2a

8a2b + [5b2a - 3b2a] + 22

8a2b + 2b2a +22

So the answer is , 8a2b + 2b2a +22