ab-[bc-{ca+ab+(bc-ca-ab)}]
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Answer:
=》 ab
Step-by-step explanation:
ab-[bc-{ca+ab+(bc-ca-ab)}]
=》 (ab - [ bc - { ca + ab + bc - ac - ab }]
=》 ( ab - [ bc - ca - ab - bc + ac + ab ])
=》( ab - bc + ac + ab + bc - ac - ab )
=》 ab . ( Answer ).
●EXPLANATION:●
It is very easy but we remember the "+" and "- " . because it is very dangerous .
=》 + and + =》 +
+ and - = 》 -
- and - =》 +
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