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xeze [42]
2 years ago
5

Solutions to this quadratic F(x) = x^2 + x - 2

Mathematics
1 answer:
dybincka [34]2 years ago
4 0

Answer:

x = -2 & x = 1

Step-by-step explanation:

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Answer:

  A.  √13

Step-by-step explanation:

You can make an educated guess and come to the right conclusion.

The triangle is nearly an equilateral triangle. A triangle with two sides 3 and an angle of 60° would have a third side of 3. A triangle with two sides of 4 and an angle of 60° would have a third side of 4.

So, the third side must be between 3 and 4. Here is an evaluation of the answer choices:

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A -- between 3 and 4, the correct choice

B -- 3, too short

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The question can be answered using your triangle solver app on your calculator, or using the Law of Cosines.

  c = √(a^2 +b^2 -2ab·cos(C))

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  c = √13 . . . . . length of the side opposite the 60° angle

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