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3 years ago

Help again, I’m most likely gonna keep asking questions for this lesson but it’s polynomial equations with factoring. algebra

Mathematics

1 answer:

miv72 [106K]3 years ago

6 0

Answer:

Step-by-step explanation:

The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find the probability of getting someone who tests negative, given that he or she did not have the disease.

The individual actually had the disease

Yes

Positive

137

Negative

120

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3 years ago

5x²+4x+3=0 solve for x

juin [17]

Answer:

${ \underline{ \sf{x \: is \: \: \{ \frac{ - 5 + i \sqrt{35} }{10} \} } \: \: and \: \: \{ \frac{ - 5 - i \sqrt{35} }{10} \}} }$

Step-by-step explanation:

$5 {x}^{2} + 4x + 3 = 0$

from quadratic formular:

${ \sf{x = \frac{ - b± \sqrt{ {b}^{2} - 4ac } }{2a} }}$

general equation:

${ax}^{2} + bx + c = 0$

a is 5, b is 4 and c is 3:

substitute in formular:

${ \sf{x = \frac{ - 5± \sqrt{ {5}^{2} - (4 \times 5 \times 3) } }{(2 \times 5)} }} \\ \\ { \sf{x = \frac{ - 5± \sqrt{ - 35} }{10} }}$

but from complexes, i² = -1

${ \sf{x = \frac{ - 5± \sqrt{35 {i}^{2} } }{10} }} \\ \\ = { \sf{x = \frac{ - 5±i \sqrt{35} }{10} }}$

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3 years ago

Help again, I’m most likely gonna keep asking questions for this lesson but it’s polynomial equations with factoring. *algebra*

Help again, I’m most likely gonna keep asking questions for this lesson but it’s polynomial equations with factoring. algebra