Pertanyaan

Fungsi kuadrat yang grafiknya melalui titik (-1, 2), (1, 0), dan (2, 5) adalah…

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Klaim

F. Pratama

Master Teacher

Mahasiswa/Alumni Universitas Putra Indonesia YPTK Padang

Jawaban terverifikasi

Pembahasan

$a minus b plus c space equals space 2 bottom enclose a plus b plus c space equals space 0 end enclose space minus space space space space space space space minus 2 b space equals space 2 space space space space space space space space space space space space space space b space equals fraction numerator 2 over denominator negative 2 end fraction equals negative 1$

$space space a plus c space equals space 1 bottom enclose 4 a plus c space equals space 7 end enclose minus space space space minus 3 a equals negative 6 space space space space space space space space space space a equals fraction numerator negative 6 over denominator negative 3 end fraction equals 2 2 plus c equals 1 space space space space space space space c equals negative 1 y equals 2 x squared minus x minus 1$