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# Domain

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The domain of the equation y = 3x/(x^2 - 5x - 4) is the set of all real numbers with the exception of the values x = A and x = B. What is A + B?

Jul 22, 2021

#1
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In order for the domain to not work, the denominator.

x2-5x-4=0

$$x = {5 \pm \sqrt{25+16} \over 2}$$

A = (5+√41)/2

B = (5-√41/2)

A+B = (5+√41+5-√41)/2

A+B = 5

Jul 22, 2021