The simplified expression is
and the restriction is 
<h3>How to simplify the expression?</h3>
The expression is given as:

Express x^2 - y^2 as (x + y)(x - y) and factorize other expressions

Rewrite the expression as products

Cancel out the common factors

Express 4x^2 - y^2 as (2x - y)(2x + y)

Cancel out the common factors

Take the LCM

Hence, the simplified expression is
and the restriction is 
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<span>f(x)=5x+3/6x+7
This means that f(6/x) = [</span>5(6/x)+3] / [6(6/x)+7] = [ 30/x +3 ] / [36/x +7]
If we assume x≠0 , f(6/x) = [30 +3x]/ [36 + 7x]
g(x)=√<span> [ x^2-4x ]
</span>
g(x-4) = √ [ (x-4)^2-4(x-4) ] = √ [ x² -8x +16 -4x +16 ] = √ [ x^2-12x +32]
Answer:
d = 3x²+ 4x - 7
C'est la réponse j'espère que ça aide.
Answer:
Do you have the math exercices? I am sorry but I can just help in the subjects concerning math. It is been some time since I studied biology and other high-school subjects.