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Persamaan kuadrat 4 x squared plus p equals negative 1 mempunyai akar x subscript 1 space d a n space x subscript 2. space J i k a space x subscript 1 equals 1 half comma space m a k a space p left parenthesis x subscript 1 squared plus x subscript 2 right parenthesis equals...

  1. negative 1 1 half

  2. negative 1 1 fourth

  3. -1

  4. negative 1 half

  5. negative 1 fourth

R. RGFLSATU

Master Teacher

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Pembahasan

Persamaan kuadrat 4 x squared plus p equals negative 1 mempunyai akar x subscript 1 space d a n space x subscript 2. space D i k e t a h u i space x subscript 1 equals 1 half

4 x squared plus p equals negative 1  4 x squared plus p plus 1 equals 0  x subscript 1 equals 1 half rightwards arrow 4 open parentheses 1 half close parentheses squared plus p plus 1 equals 0  1 plus p plus 1 equals 0  p equals negative 2  p left parenthesis x subscript 1 squared plus x subscript 2 squared right parenthesis equals negative 2 left parenthesis x subscript 1 plus x subscript 2 right parenthesis squared minus 2 x subscript 1 x subscript 2  space space space space space space space space space space space space space space space space space space space equals negative 2 open square brackets open parentheses 0 close parentheses squared minus 2 open parentheses negative 1 fourth close parentheses close square brackets  space space space space space space space space space space space space space space space space space space space equals negative 2 open parentheses 0 plus 1 half close parentheses  space space space space space space space space space space space space space space space space space space space equals negative 2 open parentheses 1 half close parentheses  space space space space space space space space space space space space space space space space space space space equals negative 1

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