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Mathematics 17 Online
OpenStudy (anonymous):

Please help

OpenStudy (anonymous):

@waterineyes

OpenStudy (anonymous):

Where??

OpenStudy (anonymous):

\[\sqrt{x^{2}-7x+12}\]

OpenStudy (anonymous):

Find the range?

OpenStudy (anonymous):

Are you sure you want to find its range and not domain???

OpenStudy (anonymous):

the domain?

OpenStudy (anonymous):

can u explain what domain and range is?

OpenStudy (anonymous):

I can here explain you about the domain only..

OpenStudy (anonymous):

See your expression is: \[f(x) = \sqrt{x^2 - 7x + 12}\] For domain : You should know the values inside the root cannot be 0 instead greater than or equal to zero.. So, \[x^2 - 7x + 12 \ge 0\] Can you factorize it??

OpenStudy (anonymous):

Sorry cannot be negative..

OpenStudy (anonymous):

(x-3)(x-4)

OpenStudy (anonymous):

Yes so you got:" \[(x-3)(x-4) \ge 0\]

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

So you will get: \[x \le 3\] And: \[x \ge 4\]

OpenStudy (anonymous):

hw did u do that ? i need steps

OpenStudy (anonymous):

Well I also don't know about this.. Ha ha ha..

OpenStudy (anonymous):

i think we have to do it logically right..no equations involved, only that the root cannot be negative

OpenStudy (anonymous):

Do you know the graph of Quadratic function...??

OpenStudy (anonymous):

i hve learnt it..

OpenStudy (anonymous):

cuts y axis at x =3 and x = 4

OpenStudy (anonymous):

|dw:1342957460780:dw|

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