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Eduardwww [97]
2 years ago
11

Factor the trinomial x^2-9x+4x

Mathematics
2 answers:
8090 [49]2 years ago
8 0

Answer:


Step-by-step explanation:

Simplifying

x2 + -9x = 4x + -4

Reorder the terms:

-9x + x2 = 4x + -4

Reorder the terms:

-9x + x2 = -4 + 4x

Solving

-9x + x2 = -4 + 4x

Solving for variable 'x'.

Reorder the terms:

4 + -9x + -4x + x2 = -4 + 4x + 4 + -4x

Combine like terms: -9x + -4x = -13x

4 + -13x + x2 = -4 + 4x + 4 + -4x

Reorder the terms:

4 + -13x + x2 = -4 + 4 + 4x + -4x

Combine like terms: -4 + 4 = 0

4 + -13x + x2 = 0 + 4x + -4x

4 + -13x + x2 = 4x + -4x

Combine like terms: 4x + -4x = 0

4 + -13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.

4 + -13x + -4 + x2 = 0 + -4

Reorder the terms:

4 + -4 + -13x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0

0 + -13x + x2 = 0 + -4

-13x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4

-13x + x2 = -4

The x term is -13x.  Take half its coefficient (-6.5).

Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.

-13x + 42.25 + x2 = -4 + 42.25

Reorder the terms:

42.25 + -13x + x2 = -4 + 42.25

Combine like terms: -4 + 42.25 = 38.25

42.25 + -13x + x2 = 38.25

Factor a perfect square on the left side:

(x + -6.5)(x + -6.5) = 38.25

Calculate the square root of the right side: 6.184658438

Break this problem into two subproblems by setting  

(x + -6.5) equal to 6.184658438 and -6.184658438.


Alik [6]2 years ago
4 0

Answer:


Step-by-step explanation:Simplifying


x2 + -9x = 4x + -4


Reorder the terms:


-9x + x2 = 4x + -4


Reorder the terms:


-9x + x2 = -4 + 4x


Solving


-9x + x2 = -4 + 4x


Solving for variable 'x'.


Reorder the terms:


4 + -9x + -4x + x2 = -4 + 4x + 4 + -4x


Combine like terms: -9x + -4x = -13x


4 + -13x + x2 = -4 + 4x + 4 + -4x


Reorder the terms:


4 + -13x + x2 = -4 + 4 + 4x + -4x


Combine like terms: -4 + 4 = 0


4 + -13x + x2 = 0 + 4x + -4x


4 + -13x + x2 = 4x + -4x


Combine like terms: 4x + -4x = 0


4 + -13x + x2 = 0


Begin completing the square.


Move the constant term to the right:


Add '-4' to each side of the equation.


4 + -13x + -4 + x2 = 0 + -4


Reorder the terms:


4 + -4 + -13x + x2 = 0 + -4


Combine like terms: 4 + -4 = 0


0 + -13x + x2 = 0 + -4


-13x + x2 = 0 + -4


Combine like terms: 0 + -4 = -4


-13x + x2 = -4


The x term is -13x.  Take half its coefficient (-6.5).


Square it (42.25) and add it to both sides.


Add '42.25' to each side of the equation.


-13x + 42.25 + x2 = -4 + 42.25


Reorder the terms:


42.25 + -13x + x2 = -4 + 42.25


Combine like terms: -4 + 42.25 = 38.25


42.25 + -13x + x2 = 38.25


Factor a perfect square on the left side:


(x + -6.5)(x + -6.5) = 38.25


Calculate the square root of the right side: 6.184658438


Break this problem into two subproblems by setting  


(x + -6.5) equal to 6.184658438 and -6.184658438.


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<u>Step-by-step explanation:</u>

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Veseljchak [2.6K]
<h3>Answer: B. 781.6 feet approximately</h3>

=======================================================

Work Shown:

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