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Diketahui adalah akar-akar persamaan kuadrat . Nil...

Diketahui x subscript 1 space d a n space x subscript 2 adalah akar-akar persamaan kuadrat x squared plus 2 x plus 6 equals 0. Nilai dari x subscript 1 squared plus x subscript 2 squared minus x subscript 1 x subscript 2 = ....

  1. -14

  2. -6

  3. -2

  4. 6

  5. 10

Jawaban:

P e n j u m l a h a n space d a n space p e r k a l i a n space a k a r minus a k a r space p e r s a m a a n space k u a d r a t space a x squared plus b x plus c equals 0 space y a n g space m e m i l i k i space a k a r minus a k a r space x subscript 1 d a n x subscript 2 comma y a i t u colon x subscript 1 squared plus x subscript 2 squared minus x subscript 1 x subscript 2 equals left parenthesis x subscript 1 plus x subscript 2 right parenthesis minus 3 x subscript 1 x subscript 2 equals space left parenthesis negative 2 over 1 right parenthesis squared minus 3 left parenthesis 6 over 1 right parenthesis equals negative 14

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