Question

what should we added to 3a²+ab-b²to a²+b²+2ab​

Answer 1

Answer:

vvvvvvvvvvvvvvvvvvvccccccccccc

Answer 2

Answer:

2a² - ab - 2b² - a²

Step-by-step explanation:

let the no be = x

3a² + ab -b² + x = a² + b² + 2ab

x = 3a² + ab -b² - ( a² + b² + 2ab)

3a² + ab -b² - a² - b² - 2ab     (removing the brackets)

2a² - ab - 2b² - a²       ( adding / subtracting like terms)

∴ 2a² - ab - 2b² - a²  should be added to 3a²+a b -b² to get a²+ b²+ 2ab​