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J ika f ( x ) = 2 x 2 + x − 10 , maka t i t ik p u n c ak d a r i f u n g s i k u a d r a t t erse b u t a d a l ah ....

  1. open parentheses negative 1 fourth comma space minus 81 over 8 close parentheses

  2. open parentheses negative 1 fourth comma space 81 over 8 close parentheses

  3. open parentheses 1 fourth comma space minus 81 over 8 close parentheses

  4. open parentheses 1 fourth comma space 9 over 2 close parentheses

  5. open parentheses 1 fourth comma space minus 9 over 2 close parentheses

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N. Rahayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

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Pembahasan

T i t i k space p u n c a k space d a r i space f u n g s i space k u a d r a t space d i n o t a s i k a n space open parentheses x subscript p comma space y subscript p close parentheses comma space d i m a n a space x subscript p equals negative fraction numerator b over denominator 2 a end fraction space comma space d a n space y subscript p equals fraction numerator b squared minus 4 a c over denominator negative 4 a end fraction  P a d a space f u n g s i space k u a d r a t space f left parenthesis x right parenthesis equals 2 x squared plus x minus 10 comma x subscript p equals negative fraction numerator b over denominator 2 a end fraction equals negative fraction numerator 1 over denominator 2 open parentheses 2 close parentheses end fraction equals negative 1 fourth y subscript p equals fraction numerator b squared minus 4 a c over denominator negative 4 a end fraction equals fraction numerator open parentheses 1 close parentheses squared minus 4 left parenthesis 2 right parenthesis left parenthesis negative 10 right parenthesis over denominator negative 4 left parenthesis 2 right parenthesis end fraction equals fraction numerator 1 plus 80 over denominator negative 8 end fraction equals negative 81 over 8 J a d i space t i t i k space p u n c a k space d a r i space p e r s a m a a n space k u a d r a t space t e r s e b u t space a d a l a h space open parentheses negative 1 fourth comma space minus 81 over 8 close parentheses

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