Question

6. What should be added to a²
+ 2ab + b2 to obtain 2a2 + 4ab?

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Answer 1

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let the number be x

a²+2ab+b²+x= 2a²+4ab

x= 2a²+4ab-a²-2ab-b²

x= a²+2ab- b²

So , a²+2ab- b² must be added in a²+2ab+b²

Answer 2

Answer:

a²+6ab+b²

Step-by-step explanation:

Step 1: Let the number be X.

Step 2: a²+2ab+b²+X=2a²+4ab.

Step 3: Transposing

X=2a²+4ab-a²+2ab+b²

Step 4 :X= a²+6ab+b²

Therefore answer is= a²+6ab+b².

Thank you.