Q.
( 4 + 9 )² - ( 4² + 9² ) =
• no copas
• no ngasal
• rapi
• pakai cara, cara bersusun
( 4 + 9 )² - ( 4² + 9² ) =
• no copas
• no ngasal
• rapi
• pakai cara, cara bersusun
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( 4 + 9 )² - ( 4² + 9² )
15² - ( ( 4 × 4 ) + ( 9 × 9 ) )
225 - ( 16 + 81 )
225 - ( 97 )
225 - 97
128
( 4 + 9 )² - ( 4² + 9² )
= ( 13 × 13 ) - ( 4 × 4 ) + ( 9 × 9 )
= 169 - ( 4 × 4 ) + ( 9 × 9 )
= 169 - ( 16 + 81 )
= 169 - 97
= 72