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Aleks [24]
2 years ago
6

F(x)=2x^2-5;find when f(x)=-7​

Mathematics
2 answers:
Dominik [7]2 years ago
7 0

Answer:

±i = x

Step-by-step explanation:

f(x)=2x^2-5;

f(x)=-7​

-7 = 2x^2 -5

Add 5 to each side

-7+5 = 2x^2 -5+5

-2 =2x^2

Divide by 2

-2/2 =2x^2 /2

-1 = x^2

Take the square root of each side

sqrt(-1) = sqrt(x^2)

±i = x

Daniel [21]2 years ago
6 0

Answer:

x=i or no solution exists depending on the user's grade

Step-by-step explanation:

f(x) = 2x^2-5

-7 = 2x^2-5

-2 = 2x^2, x^2=-1, x=i

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8  is the largest possible value of the median of all nine numbers in this list.

Lets simplify it,

⇒  The given six numbers are 7,8,3,5,9 and 5.

⇒  Arrange the six numbers in order 3,5,5,7,8,9.

⇒  We have three more numbers to insert into the list, and the median will be the  highest 5(and 5 lowest) number on the list. If the three numbers are greater than 9, the median will be the highest it can possible be.

∴  The median is the 5th item of data which is 8.

∴  Median=8

Hence 8  is the largest possible value of the median of all nine numbers in this list.

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1 year ago
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777dan777 [17]

Answer:

B. y - 35 = 2(x - 10)

Step-by-step explanation:

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6 0
3 years ago
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bixtya [17]

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3 0
2 years ago
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anyanavicka [17]

Answer:

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Step-by-step explanation:

4 0
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11111nata11111 [884]

Answer:

The which spends on the piano is( 50 minutes )

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Step-by-step explanation:

The steps of the solution in the above photo

I hope that is useful for you :)

8 0
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