( a + b )² - ( a² + b² ) ?
= ( a + b )² - ( a² + b² )
= ( a² + 2ab + b² ) - ( a² + b² )
= a² + 2ab + b² ) - a² - b²
= ( a² - a² ) + ( b² + b² ) + 2ab
= 0 + 0 + 2ab
= 2ab
Semoga Bermanfaat : D
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( a + b )² - ( a² + b² ) ?
= ( a + b )² - ( a² + b² )
= ( a² + 2ab + b² ) - ( a² + b² )
= a² + 2ab + b² ) - a² - b²
= ( a² - a² ) + ( b² + b² ) + 2ab
= 0 + 0 + 2ab
= 2ab
Semoga Bermanfaat : D