why (a+b) 2= a2+b2+2ab?
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why (a+b) 2= a2+b2+2ab?
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YouTubeKatrathu Marine
1. ( a b )2 = a2 2ab b2 2. ( a - b )2 = a2 - 2ab b2 3. a2 - b2 = ( a - b )( a b ) 4. ( a b )3 = a3 3a2b 3ab2 b3 5. ( a - b )3 = a3 - 3a2b 3ab2 - b3 6. a3 b3 = ( a b )( a2 - ab b2 ) 7. a3 - b3 = ( a - b )( a2 ab b2 ) sin α: là tỉ số giữa cạnh đối và cạnh huyền của góc α cos α: là tỉ số giữa cạnh kề và cạnh huyền của góc α tan α: là tỉ số giữa cạnh đối và cạnh kề của góc α cot α: là tỉ số giữa cạnh kề và cạnh đối của góc α 1. sin (a ± b) = sin a.cos b ± cos a.sin b 2.
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1. ( a b )2 = a2 2ab b2 2. ( a - b )2 = a2 - 2ab b2 3. a2 - b2 = ( a - b )( a b …
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why does (a+b)² = a² + 2ab + b²?
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# ( a+b )² = a²+b²+2ab and ( a-b)² = a²+b² - 2ab formula proof
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