Well, this week has been interesting. Not only did I fail another test, but I failed it twice. As for the new thing we learned, I understand completely everything we learned on I don't know what day. I know that you put brackets around the absolute points and parentheses go around the infinity (because it is not a set point). The rest of the domain and range stuff seems pretty simple.
For polynomials, the domain is always (-∞,∞). For fractions, the bottom is set to 0 then you solve for x. For square roots, you set the inside equal to 0, you create a number line, you use the values on each side of the numbers on that number line, you rid the problem of negatives, then set up intervals, and graph.
I know you factor by grouping if there are even terms and you use quadratic form when there are three terms. Also, you don't use group factoring if there is no number in front. What I don't know is when you plug in the problem to you calculator and have to check the x's, how do you know if it is correct or not (I tried asking nunu but that didn't go over so well)?
(sorry I posted this kinda late >.<)
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when plugging it into the calculator all you have to do is see if it equals zero or not. If it equals zero then its right.
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