put - b in place of b in identity I) do you get identity II) ?
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rohit3272:
what is the answer
Answered by
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(a+b)^2=a^2 +2ab+b^2
put b = -b
(a-b)^2= a^2 +2a(-b)+ (-b)^2
(a-b)^2 =a^2-2ab+b^2
this is verified
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