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Dari kesamaan   maka

Dari kesamaan

begin mathsize 14px style 5 x squared minus 2 x plus 3 identical to a x squared plus open parentheses b plus c close parentheses x plus 7 open parentheses b minus c close parentheses end style 

maka begin mathsize 14px style a plus 8 b minus 6 c equals space.... end style 

  1. begin mathsize 14px style negative 2 end style 

  2. begin mathsize 14px style 3 end style 

  3. begin mathsize 14px style 5 end style 

  4. begin mathsize 14px style 6 end style 

  5. begin mathsize 14px style 10 end style 

Jawaban:

begin mathsize 14px style a x squared plus open parentheses b plus c close parentheses x plus 7 open parentheses b minus c close parentheses equals 5 x squared minus 2 x plus 3 end style 

Koefisien begin mathsize 14px style x squared end style 

begin mathsize 14px style a equals 5 end style 

Koefisien begin mathsize 14px style x end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell b plus c end cell equals cell negative 2 end cell row b equals cell negative c minus 2 end cell end table end style 

Konstanta

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 7 left parenthesis b minus c right parenthesis end cell equals 3 row cell 7 b minus 7 c end cell equals 3 row cell 7 left parenthesis negative c minus 2 right parenthesis minus 7 c end cell equals 3 row cell negative 7 c minus 14 minus 7 c end cell equals 3 row cell negative 7 c minus 7 c end cell equals cell 3 plus 14 end cell row cell negative 14 c end cell equals 17 row c equals cell negative 17 over 14 end cell end table end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row b equals cell negative c minus 2 end cell row blank equals cell negative open parentheses fraction numerator negative 17 over denominator 14 end fraction close parentheses minus 2 end cell row blank equals cell 17 over 14 minus 28 over 14 end cell row b equals cell fraction numerator negative 11 over denominator 14 end fraction end cell end table end style 

nilai dari

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell a plus 8 b minus 6 c end cell equals cell 5 plus 8 open parentheses fraction numerator negative 11 over denominator 14 end fraction close parentheses minus 6 open parentheses fraction numerator negative 17 over denominator 14 end fraction close parentheses end cell row blank equals cell 5 plus 4 open parentheses fraction numerator negative 11 over denominator 7 end fraction close parentheses minus 3 open parentheses fraction numerator negative 17 over denominator 7 end fraction close parentheses end cell row blank equals cell open parentheses 35 over 7 close parentheses minus open parentheses 44 over 7 close parentheses plus open parentheses 51 over 7 close parentheses end cell row blank equals cell 42 over 7 end cell row blank equals 6 end table end style 

Jadi, jawaban yang tepat adalah D.

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