Question

5m2 - 4n2 - 4mn from 5m2 + 3n2 - 2mn5m2−4n2−4mnfrom5m2+3n2−2mn
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Answer 1

Hi! first of all I think it was like this. There might be some mistake from your side, but no problem. I have solved it and I think it should be like this. Hope it benefits you.

Step-by-step explanation:

= (5m2 + 3n2 - 2mn) + (5m2 + 3n2 - 2mn + 5m2 - 4n2 - 4mn) + (5m2- 4n2- 4mn)

= 5m2 + 3n2 - 2mn + 5m2 + 3n2 - 2m. + 5m2 - 4n2- 4mn + 5m2 - 4n2 - 4mn

= 5m2 + 3n2 - 2mn + 5m2 + 3n2 - 2mn + 5m2 - 4n2 - 4mn + 5m2 - 4n2 - 4mn

= 5m2 + 5m2 + 5m2 + 5m2 + 3n2 + 3n2 + 4n2 - 4n2 - 2mn - 2mn - 4mn - 4mn

= 20m2 + 6n2 - 12mn

• Hope it helps. If you find any of my mistake please tell me. Actually your question wasn't written correctly so it might be this way. Thanks

Answer 2

Step-by-step explanation:

The steps to follow to carry out this operation is to bring together those who are equal: 2mn + 4n ^ 2 and 5m ^ 2-7mn

We have: 2mn and -7mn

Therefore: 5m ^ 2 + (2-7) mn + 4n ^ 2

What will result in: 5m ^ 2 - 5mn + 4n ^ 2