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S e b u ah f u n g s i k u a d r a t y an g m e m o t o n g s u mb u x d i t i t ik ( 1 , 0 ) d an ( 5 , 0 ) ser t a m e l a l u i t i t ik ( 0 , 10 ) a d a l ah ....

  1. 2 x squared plus 12 x plus 10

  2. 2 x squared minus 12 x plus 10

  3. 2 x squared minus 12 x minus 10

  4. x squared minus 12 x plus 10

  5. x squared minus 12 x plus 10

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N. Rahayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

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Pembahasan

F u n g s i space k u a d r a t space y a n g space m e m o t o n g space s u m b u space x space d i space 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 d a n space m e l a l u i space space s e b u a h space t i t i k space left parenthesis x subscript 3 comma y subscript 3 right parenthesis space a d a l a h space colon space y equals a left parenthesis x minus x subscript 1 right parenthesis left parenthesis x minus x subscript 2 right parenthesis space  S e h i n g g a space f u n g s i space k u a d r a t space y a n g space m e m o t o n g space s u m b u space x space d i space t i t i k space left parenthesis 1 comma 0 right parenthesis space d a n space left parenthesis 5 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 10 right parenthesis space a d a l a h space colon space f left parenthesis x right parenthesis equals a left parenthesis x minus 1 right parenthesis left parenthesis x minus 5 right parenthesis space space K e m u d i a n space d i c a r i space n i l a i space a comma space d e n g a n space m e n s u b s t i t u s i space left parenthesis 0 comma space 10 right parenthesis space k e space f u n g s i space k u a d r a t space t e r s e b u t. space f left parenthesis 0 right parenthesis equals 10 space ⟺ 10 equals a left parenthesis 0 minus 1 right parenthesis left parenthesis 0 minus 5 right parenthesis space ⟺ 10 equals a left parenthesis negative 1 right parenthesis left parenthesis negative 5 right parenthesis space space ⟺ 10 equals 5 a space space space ⟺ a equals 2 space  S e h i n g g a space f u n g s i space k u a d r a t space t e r s e b u t space m e n j a d i space y equals 2 left parenthesis x minus 1 right parenthesis left parenthesis x minus 5 right parenthesis equals 2 open parentheses x squared minus 6 x plus 5 close parentheses equals 2 x squared minus 12 x plus 10

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Sebuah fungsi kuadrat memotong sumbu X di A(1,0) dan B(2,0). Jika fungsi kuadrat itu melalui titik (0, 4), maka persamaan fungsi kuadratnya adalah....

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