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Virty [35]
3 years ago
6

Using the equation x squared minus c equals 0 , what value of c has 9 and -9 as solutions.

Mathematics
1 answer:
Svetach [21]3 years ago
3 0

9514 1404 393

Answer:

  c = 81

Step-by-step explanation:

The equation x² -c = 0 can be factored as ...

  (x -√c)(x +√c) = 0

which has roots ±√c.

The roots are given as ±9, so we have ...

  ±9 = ±√c

  c = (±9)² = 81

The value c = 81 makes the equation have ±9 as solutions.

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Answer:

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Find the exact value of sin 105 degrees​
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Answer:

\frac{\sqrt{6}+\sqrt{2}}{4}

Step-by-step explanation:

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On a blueprint, the scale indicates that 7 cm represent 16 ft. What is the length of a room that is 9.8 cm long and 5 cm wide on
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______=______
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