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Diketahui f ( x ) = x 2 − 2 x + 3 . Tentukan nilai fungsi f ( a + b ) .

Diketahui . Tentukan nilai fungsi .

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begin mathsize 14px style space space space space space straight f left parenthesis x right parenthesis equals x squared minus 2 x plus 3 straight f left parenthesis straight a plus straight b right parenthesis equals left parenthesis straight a plus straight b right parenthesis squared minus 2 left parenthesis straight a plus straight b right parenthesis plus 3 straight f left parenthesis straight a plus straight b right parenthesis equals straight a squared plus 2 ab plus straight b squared minus 2 straight a minus 2 straight b plus 3 straight f left parenthesis straight a plus straight b right parenthesis equals straight a squared plus straight b squared plus 2 ab minus 2 straight a minus 2 straight b plus 3 end style

 

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