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denpristay [2]
3 years ago
9

Use the quadratic formula to determine the exact solutions to the equation.

Mathematics
1 answer:
zmey [24]3 years ago
4 0
For this case we have the following equation:
 x ^ 2-2x-4 = 0
 We use the quadratic formula:
 x = (- b +/- root (b ^ 2 - 4 * a * c)) / (2 * a)
 Substituting values we have:
 x = (- (- 2) +/- root ((- 2) ^ 2 - 4 * (1) * (- 4))) / (2 * (1))
 Rewriting we have:
 x = (2 +/- root (4 + 16)) / 2
 x = (2 +/- root (20)) / 2
 x = (2 +/- root (4 * 5)) / 2
 x = (2 +/- 2raiz (5)) / 2
 x = (1 +/- root (5))
 The roots are:
 x1 = (1 + root (5))
 x2 = (1 - root (5))
 Answer:
 
x1 = (1 + root (5))
 
x2 = (1 - root (5))
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Answer:

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4 years ago
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Answer:

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Step-by-step explanation:

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6 0
3 years ago
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spin [16.1K]

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7 0
3 years ago
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Step-by-step explanation:

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Since 39² equals 15² + 36², option A is the correct answer.

7 0
3 years ago
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4 years ago
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