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Persamaan grafik fungsi kuadrat yang memotong sumbu X pada titik (2,0) dsn (4,0) serta memotong sumbu Y di titik (0,-8) adalah ....

Persamaan grafik fungsi kuadrat yang memotong sumbu X pada titik (2,0) dsn (4,0) serta memotong sumbu Y di titik

(0,-8) adalah ....

  1. f left parenthesis x right parenthesis equals x squared plus 8 x plus 2

  2. f left parenthesis x right parenthesis equals x squared minus 8 x plus 2

  3. f left parenthesis x right parenthesis equals x squared minus 2 x plus 8

  4. f left parenthesis x right parenthesis equals x squared plus 2 x minus 8

  5. f left parenthesis x right parenthesis equals x squared minus 2 x minus 8

Jawaban:

P e r s a m a a n space f u n g s i space k u a d r a t space y a n g space g r a f i k n y a space m e m o t o n g space s u m b u minus X space d i space d u a t i t i k space left parenthesis x subscript 1 comma 0 right parenthesis space d a n space left parenthesis x subscript 2 comma 0 right parenthesis space s e r t a space m e l a l u i space t i t i k space l a i n space left parenthesis x comma y right parenthesis comma y a i t u colon  f left parenthesis x right parenthesis equals a left parenthesis x minus x subscript 1 right parenthesis left parenthesis x minus x subscript 2 right parenthesis  M a k a colon P e r s a m a a n space f u n g s i space k u a d r a t space y a n g space g r a f i k n y a space m e m o t o n g space s u m b u space minus X space d i t i t i k space left parenthesis 2 comma 0 right parenthesis d a n left parenthesis negative 4 comma 0 right parenthesis space s e r t a space m e l a l u i space t i t i k space left parenthesis 0 comma negative 8 right parenthesis comma y a i t u colon  minus 8 equals a left parenthesis 0 minus 2 right parenthesis left parenthesis 0 minus left parenthesis negative 4 right parenthesis right parenthesis minus 8 equals space a left parenthesis negative 2 right parenthesis left parenthesis 4 right parenthesis left right arrow a equals 1  S e h i n g g a colon f left parenthesis x right parenthesis equals 1 left parenthesis x minus 2 right parenthesis left parenthesis x minus left parenthesis negative 4 right parenthesis right parenthesis space  f left parenthesis x right parenthesis equals left parenthesis x minus 2 right parenthesis left parenthesis x plus 4 right parenthesis  f left parenthesis x right parenthesis equals x squared plus 2 x minus 8

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