Question

What should be subtracted from a2 +2ab + b2

to obtain 4ab + b2​

Answer 1

Answer:

suppose we subtract X from a2+2ab+b2

a2+2ab+b2-X=4ab+b2

a2+2ab+b2-b2-4ab=X

X=a2-4ab

Answer 2

$\large { \underline{ \bf \red{Question:- }}}$

Subtract a2 +2ab from b2 +4ab

$\large { \underline{ \bf \purple{Solution:- }}}$

$⟹a² +b² + 2ab - (a² - 2ab)$

$⟹a² +b ² + 2ab -a² + b² +2ab$

$⟹a² - a² + b² + 2ab + 2ab$

$⟹4ab$

$\large { \underline{ \bf \pink{Notes:- }}}$

• Same Sign = Addition (+)
• Opposite Sign = Subtraction (-)

$\large { \underline{ \bf \green{Therefore:- }}}$

$4ab \: is \: the \: Correct \: Answer$

$\large { \underline{ \bf \blue{For \:more \:information:- }}}$

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