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Jika dan , maka

Jika begin mathsize 14px style straight f open parentheses straight x close parentheses equals 2 straight x squared minus 6 straight x plus 4 end style dan begin mathsize 14px style straight g open parentheses straight x close parentheses equals straight x plus 1 end style, maka begin mathsize 14px style open parentheses straight f ring operator straight g close parentheses open parentheses straight x close parentheses equals... end style

  1. begin mathsize 14px style 2 straight x squared minus 6 straight x end style 

  2. begin mathsize 14px style 2 straight x squared minus 6 straight x plus 5 end style 

  3. begin mathsize 14px style 2 straight x squared minus 2 straight x end style 

  4. begin mathsize 14px style 2 straight x squared minus 6 straight x plus 3 end style

  5. begin mathsize 14px style 2 straight x squared plus 2 straight x end style 

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begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses straight f ring operator straight g close parentheses open parentheses straight x close parentheses end cell equals cell straight f open parentheses straight g open parentheses straight x close parentheses close parentheses end cell row blank equals cell straight f open parentheses straight x plus 1 close parentheses end cell row blank equals cell 2 open parentheses straight x plus 1 close parentheses squared minus 6 open parentheses straight x plus 1 close parentheses plus 4 end cell row blank equals cell 2 open parentheses straight x squared plus 2 straight x plus 1 close parentheses minus 6 straight x minus 6 plus 4 end cell row blank equals cell 2 straight x squared plus 4 straight x plus 2 minus 6 straight x minus 2 end cell row blank equals cell 2 straight x squared minus 2 straight x end cell end table end style

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