Question

What should be added to a2

+ 2ab + b2

to obtain 3a2
+4ab

Answer 1

Answer:

Step-by-step explanation:

2a²+ 2ab - b² is added to a² + 2ab + b² to obtain 3a² + 4ab.

Checking : 2a² + 2ab - b² + a² + 2ab + b²

= ( 2a² + a² ) + ( 2ab + 2ab ) + ( - b² + b² )

= 3a² + 4ab