what should be added to a^2+ 2ab+b^2 to obtain a^2 -2ab +b^2 ?
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-4ab should be added
dhillon2345:
please do it by solving
how it become -4ab
by adding both or by subtracting
it is obvious that to make 2ab as -2ab u should add -4ab
plz
do it
you check it if it's wrong then i solve
it is only 4ab
abeee 2ab +4ab =8ab hota hai
2ab+(-4ab)=-2ab
Answered by
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Answer:
the answer is = 2ab - a^2
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