Pls solve 4 and 5

 Q4. (a) What should be added to x2 + xy + y2 to obtain 2x2 + 3xy?

​        (b) What should be subtracted from 2a + 8b + 10 to get – 3a + 7b + 16 ?


Q5. What should be taken away from 3x2 – 4y2 + 5 xy + 20 to obtain – x2  – y2  + 6xy + 20 ? 
 

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