Question

what should be added to to a square + ab + b square to get 3 a square + 4 ab​

Answer 1

Step-by-step explanation:

let

x be added to the a² + ab +b²

now

x+ a² + ab + b² = 3a²+ 4ab

x = 3a² + 4ab -( a² + ab + b²)

x = 3a² + 4ab - a² - ab - b²

x = 2a² +3ab - b²

hence,

2a² +3ab - b² must be added to get 3a²+ 4ab