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svlad2 [7]
2 years ago
7

Solve for the variable. 1) 8 - X-X=-16plsss help me explain me slow​

Mathematics
2 answers:
Lesechka [4]2 years ago
6 0
Question: 8 - X-X= -16
Answers: x = 12
Explain:
Collect the terms
8-2x= -16
Move the constant to the right-hand side and change its sign
-2x= -16-8
Calculate the difference
-2x= -24
Divide both sides of the equation by 2
X= 12
Nady [450]2 years ago
3 0

Step-by-step explanation:

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What are the solutions of x2 + 10x + 16 = 0?
Ivahew [28]

x

=

−

8

,

−

2

Explanation:

Given:

x

2

+

10

x

+

16

=

0

To complete the square put the two

x

terms on the left and the constant on the right of the equation:

x

2

+

10

x

=

−

16

Complete the square by multiplying the

x

-term by

1

2

:

1

2

⋅

10

=

5

and adding the square of this number to the right side of the equation:

5

2

=

25

(

x

+

5

)

2

=

−

16

+

25

UNDERSTANDING CHECK:

(

x

+

5

)

2

=

x

2

+

10

x

+

25

.

The

+

25

was not in the original equation. If we add

+

25

to one side of the equation, we must add the same amount to the other side of the equation to keep it balanced.

(

x

+

5

)

2

=

9

To solve, square root both sides of the equation:

√

(

x

+

5

)

2

=

±

√

9

x

+

5

=

±

3

x

=

−

5

±

3

x

=

−

5

+

3

=

−

2

,

x

=

−

5

−

3

=

−

8

x

=

−

8

,

−

2

8 0
3 years ago
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Answer:

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Step-by-step explanation:

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Vesnalui [34]

Answer:

177.8

Step-by-step explanation:

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3 0
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