Question

Solve :-
(a+b-1)+(b-a+1)

Answer 1

Answer:

2 ANSWER

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Answer 2

Answer:

(a+b-1)+(b-a+1)

= a(b-a+1) +b(b-a+1) -1(b-a+1)

= ab -a2 +a +b2 -ab +b -b -a -1

=

$- a { }^{2} + b {}^{2} - 1$