Question

14.
What must be subtracted from a^2 + b^2+ 2ab to get - 4ab + 2b^22 ?​

Answer 1

Answer:

a2 – b2 + 6ab

Step-by-step explanation:

We get, the required result by subtracting

-4ab + 2b2 from a2 + b2 + 2ab

= a2 + b2 + 2ab – (-4ab + 2b2)

= a2 + b2 + 2ab + 4ab – 2b2

= a2 + b2 – 2b2 + 2ab + 4ab

= a2 – b2 + 6ab