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SVETLANKA909090 [29]
3 years ago
13

4x2+16x+8=0 by completing the square

Mathematics
1 answer:
zlopas [31]3 years ago
5 0

Answer:

Add  

8

to both sides of the equation.

2

x

2

+

16

x

=

8

Divide each term by  

2

and simplify.

Tap for more steps...

x

2

+

8

x

=

4

To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of  

b

.

(

b

2

)

2

=

(

4

)

2

Add the term to each side of the equation.

x

2

+

8

x

+

(

4

)

2

=

4

+

(

4

)

2

Simplify the equation.

Tap for more steps...

x

2

+

8

x

+

16

=

20

Factor the perfect trinomial square into  

(

x

+

4

)

2

.

(

x

+

4

)

2

=

20

Solve the equation for  

x

.

Tap for more steps...

x

=

±

2

√

5

−

4

The result can be shown in multiple forms.

Exact Form:

x

=

±

2

√

5

−

4

Decimal Form:

x

=

0.47213595

…

,

−

8.47213595

…

Step-by-step explanation:

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Answer: 4x²−12

Step-by-step explanation:

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7 0
3 years ago
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Answer:

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Step-by-step explanation:

6 0
3 years ago
The ratio of the perimeters of two similar triangles is 4:3. What is the area of each triangle if the sum of their areas is 130
aleksandr82 [10.1K]

Answer:

Below.

Step-by-step explanation:

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25k = 130

k = 130/25 = 26/5

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6 0
2 years ago
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Yuliya22 [10]

Answer:

Step-by-step explanation:

6 0
4 years ago
whihc question is not a good survey question? dont you agree that the financial crisis is essentially over? on average how many
Neko [114]

Answer:

The correct answer would be option A, Don't you agree that the financial crisis is essentially over.

Step-by-step explanation:

A survey questionnaire is a series of question which is set formally to be asked from a specific sample of a population to gather, analyze and interpret the data obtained from the sample population. So the questions in the survey must be structured, to the point, clear, short and straight. Survey questions are desirably closed ones and the ones which do not need much explanation by the person who is doing the survey. So the first question in this question require an explanation, and also the question is not structured, clear and to the point and thus is not a good survey question. Comparatively, the second question is more structured, clear and to the point and such questions are normally desirable in the surveys.  

8 0
4 years ago
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