Doprowadź do najprostszej postaci:
a+b a a
2( -------- )2 - 2( ------- + b) ( b+ ------ )=
2 2 2
2a+2b - (a+b)*(b+a/2) = 2b+2b - ab + a²/2 + b² + ab/2
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2a+2b - (a+b)*(b+a/2) = 2b+2b - ab + a²/2 + b² + ab/2