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Studentka2010 [4]
3 years ago
7

The function, f(x) = –2x2 + x + 5, is in standard form. The quadratic equation is 0 = –2x2 + x + 5, where a = –2, b = 1, and c =

5. The discriminate b2 – 4ac is 41. Now, complete step 5 to solve for the zeros of the quadratic function. 5. Solve using the quadratic formula. x = StartFraction negative b plus or minus StartRoot b squared minus 4 a c EndRoot Over 2 a EndFraction What are the zeros of the function f(x) = x + 5 – 2x2? x = StartFraction negative 1 plus or minus StartRoot 41 EndRoot Over negative 4 EndFraction x = StartFraction 1 plus or minus StartRoot 41 EndRoot Over negative 4 EndFraction x = StartFraction negative 1 plus or minus StartRoot 39 EndRoot Over negative 4 EndFraction x = StartFraction 1 plus or minus StartRoot 39 EndRoot Over negative 4 EndFraction
Mathematics
2 answers:
joja [24]3 years ago
7 0

Answer:

The CORRECT answer is A.

Step-by-step explanation:

just did it.

maw [93]3 years ago
4 0

Answer:

To solve for the zeros of the function equate f(x) = 0

That's

- 2x² + x + 5 = 0

Using the quadratic formula

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

a = - 2 b = 1 c = 5

And from the question

b² - 4ac = 41

So we have

x =  \frac{ -  1±  \sqrt{41} }{2( - 2)}  =  \frac{ - 1± \sqrt{41} }{ - 4}

x =  \frac{1± \sqrt{41} }{4}

We have the final answer as

x =  \frac{1   + \sqrt{41} }{4}  \:  \:  \:  \: or \:  \:  \:  \: x =  \frac{1 -  \sqrt{41} }{4}

Hope this helps you

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4/5 minus 1/3 plz i need help
IRISSAK [1]

Answer:

7/15

Step-by-step explanation:

Step 1

We can't subtract two fractions with different denominators. So you need to get a common denominator. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 4 by 3, and get 12.

Then we multiply 1 by 5, and get 5.

Next we give both terms new denominators -- 5 × 3 = 15.

So now our fractions look like this:

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−  

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Step 2

Since our denominators match, we can subtract the numerators.

12 − 5 = 7

So the answer is:

7

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Step 3

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

Nope! So now we try the next greatest prime number, 3...

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2 years ago
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NemiM [27]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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Answer:

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