: (a+b+c) (a+b-c) - 2ab
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Answered by
1
Answer:
a²+b²-c² +2abc......
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Answered by
1
Answer:
( a+ b+c)(a + b- c) - 2ab
a^2 + ab - ac + b^2 + ab - bc - c^2 + ac + bc - 2 ab
a^2 +b^2 - c^2 is your answer.
Hope it will help you.
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