For the expression:

(9x^2 + 4y^2 -12xy) / (4y^2 - 9x^2)

Find the domain
Find the domain of the simplified expression

Answers

Answer 1

The domain of an expression is the set of input values the expression can take

The domain of the expression is [tex]y \ne 1.5x[/tex]The domain of the simplified expression is [tex]y \ne -1.5x[/tex]

(a) The domain of the expression

The expression is given as:

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)}[/tex]

Set the denominator to 0, to determine the domain

[tex](4y^2 - 9x^2) = 0[/tex]

Remove brackets

[tex]4y^2 - 9x^2 = 0[/tex]

Add 9x^2 to both sides

[tex]4y^2 = 9x^2[/tex]

Divide both sides by 4

[tex]y^2 = 2.25x^2[/tex]

Take positive square roots of both sides

[tex]y = 1.5x[/tex]

Hence, the domain of the expression is [tex]y \ne 1.5x[/tex]

(b) The domain of the simplified expression

The expression is given as:

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)}[/tex]

Rewrite as:

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{(9x^2 - 12xy+ 4y^2 )}{((2y)^2 - (3x)^2)}[/tex]

Expand the numerator

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{(9x^2 - 6xy - 6xy+ 4y^2 )}{((2y)^2 - (3x)^2)}[/tex]

Factorize the numerator

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{3x(3x - 2y) - 2y(3x- 2y )}{((2y)^2 - (3x)^2)}[/tex]

Factor out 3x - 2y

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{(3x - 2y)(3x- 2y )}{((2y)^2 - (3x)^2)}[/tex]

Express the denominator as a difference of two squares

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{(3x - 2y)(3x- 2y )}{(2y - 3x)(2y + 3x))}[/tex]

Rewrite as:

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{-(2y - 3x)(3x- 2y )}{(2y - 3x)(2y + 3x))}[/tex]

Cancel out the common term

[tex]\frac{(9x^2 + 4y^2 - 12xy)}{(4y^2 - 9x^2)} = \frac{-(3x- 2y )}{(2y + 3x)}[/tex]

Set the denominator to 0, to determine the domain

[tex]2y + 3x= 0[/tex]

Subtract 3x from both sides

[tex]2y= -3x[/tex]

Divide both sides by 2

[tex]y= -1.5x[/tex]

Hence, the domain of the simplified expression is [tex]y \ne -1.5x[/tex]

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Answer 2

Explanation:

Domain: y does not equal 1.5x and y does not equal -1.5x

Simplifies domain: y does not equal -1.5x


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Explanation:

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Answer below

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The ethical decision is handled based on the philosophies and compliance. Although the apple company has been hit with lawsuits before regarding property rights, and violations of the privacy, they stayed firm on what they actually believe in.

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Answers

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Answers

Answer:

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Answers

Answer:

All of these are implications of large trade deficits.

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