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4 years ago

What is the graph of the function x^2-9x+20 over x-4

Mathematics

1 answer:

Greeley [361]4 years ago

8 0

Answer:

a straight line: y = x -5, with a hole at (4, -1)

Step-by-step explanation:

The rational function can be simplified to ...

$f(x)=\dfrac{x^2-9x+20}{x-4}=\dfrac{(x-5)(x-4)}{(x-4)}\\\\f(x)=x-5\qquad\text{$x\ne 4$}$

The graph of this is a straight line, with a hole at x=4, where the function is not defined.

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We have the next information

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we sum like terms

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then we isolate the x

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z=700+700=1400ft

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