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g(x)=sqrt(x(x-15)) find the domainnnnnnn.... :/

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I'm guessing what I said last didn't help much?
It usually helps for that one problem, then I try to do it myself and I get completely lost :/ Functions are my weakness...
If so, then we can graph x(x-15) to get this (see attached)

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Other answers:

Notice how the red graph is above the x axis from -infinity to 0 then it dips below the x axis but it comes back up and goes above the x axis from 15 to infinity
so this means that the solution to x(x-15) >= 0 is (-inf, 0] U [15, inf)
yeah (-inf,0]U[15,inf) ?
where 'inf' stands for infinity
yes you nailed it

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