a²+b²+c²+2ab+2bc+2ca formula..
using this formula do any sum that u wish but formula used should be this
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Hii!!!!
it's a formula of
( -a +b + c )² = (-a)² + b² + c² + 2-(a)×b + 2bc + 2 -a×c)
=> (- a + b + c )² = a² + b² + c² - 2ab + 2bc - 2ac
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:)
Hope it helps you !!
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