Pertanyaan

Gambarlah grafik y = x 2 + 2 x − 15 .

Gambarlah grafik $y = x^{2} + 2 x - 15$ .

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D. Enty

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Jawaban terverifikasi

Pembahasan

Langkah-langkah menggambar grafik sebagai berikut: 1. Titik potong terhadap sumbu 2.Titik potong terhadap sumbu 3. Titik puncak 4. Grafik

Langkah-langkah menggambar grafik y equals x squared plus 2 x minus 15 sebagai berikut:

1. Titik potong terhadap sumbu left parenthesis y equals 0 right parenthesis

2. Titik potong terhadap sumbu open parentheses x equals 0 close parentheses

table row cell open table attributes columnalign right end attributes row cell y equals 0 squared plus 2 open parentheses 0 close parentheses minus 15 end cell row cell y equals negative 15 space space space space space space space space space space space space space end cell end table close curly brackets end cell cell left parenthesis 0 comma negative 15 right parenthesis end cell end table

3. Titik puncak

$table row cell open table attributes columnalign right end attributes row cell x equals negative fraction numerator b over denominator 2 a end fraction equals negative fraction numerator 2 over denominator 2 open parentheses 1 close parentheses end fraction equals negative 1 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space end cell row cell y equals fraction numerator b squared minus 4 a c over denominator negative 4 a end fraction equals fraction numerator open parentheses 2 close parentheses squared minus 4 open parentheses 1 close parentheses open parentheses negative 15 close parentheses over denominator negative 4 open parentheses 1 close parentheses end fraction equals fraction numerator 64 over denominator negative 4 end fraction equals negative 16 end cell end table close curly brackets end cell cell open parentheses negative 1 comma negative 16 close parentheses end cell end table$

4. Grafik y equals x squared plus 2 x minus 15