Question

What should be subtracted from 3a² - 4b²+ 5ab to obtain - a²- b² + 6ab?​

Answer 1

Answer:

To get the answer we must add 3a² - 4b²+ 5a with  - a²- b² + 6ab

Hence  3a² - 4b²+ 5ab + - a²- b² + 6ab = $2a^{2}$ + 11ab - $5b^{2}$

So $2a^{2}$ + 11ab - $5b^{2}$ should be subtracted from 3a² - 4b²+ 5a to get - a²- b² + 6ab

Hope it helps